$89.99
FREE Returns
FREE delivery Friday, May 31
Only 7 left in stock - order soon.
$$89.99 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$89.99
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Ships from
Amazon
Ships from
Amazon
Returns
30-day easy returns
30-day easy returns
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Returns
30-day easy returns
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Support
Product support included
What's Product Support?
In the event your product doesn't work as expected or you need help using it, Amazon offers free product support options such as live phone/chat with an Amazon associate, manufacturer contact information, step-by-step troubleshooting guides, and help videos. By solving product issues, we help the planet by extending the life of products. Availability of support options differ by product and country. Learn more
Support
Product support included
In the event your product doesn't work as expected or you need help using it, Amazon offers free product support options such as live phone/chat with an Amazon associate, manufacturer contact information, step-by-step troubleshooting guides, and help videos. By solving product issues, we help the planet by extending the life of products. Availability of support options differ by product and country. Learn more
Payment
Secure transaction
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Payment
Secure transaction
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more

SanDisk Extreme Pro Micro SDXC UHS-I U3 A2 V30 Memory Card + Adapter (400GB)

4.8 4.8 out of 5 stars 62,925 ratings

$89.99
FREE Returns
Available at a lower price from other sellers that may not offer free Prime shipping.
30-day easy returns
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
| Product support included
What's Product Support?
In the event your product doesn't work as expected or you need help using it, Amazon offers free product support options such as live phone/chat with an Amazon associate, manufacturer contact information, step-by-step troubleshooting guides, and help videos. By solving product issues, we help the planet by extending the life of products. Availability of support options differ by product and country.
400GB
{"desktop_buybox_group_1":[{"displayPrice":"$89.99","priceAmount":89.99,"currencySymbol":"$","integerValue":"89","decimalSeparator":".","fractionalValue":"99","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"%2F%2B3a5LJjBA7QNKVoWuB8tisfqbjs2No%2FONbGfEJvYk4Qci27W%2FOILWrPiAeYgqO5519j%2F28Evcr7G4DeSLqxWS%2FIjdg8Am7urT6vuNQm5zdFJC5HY8q5uRKFC6ip6VMEPXY42bBVn6eybTU5Q%2BR9%2BKTZxF3LVPHupj9CgcFQ%2FS0g0al0TZ36dvhOLj2%2BDNHn","locale":"en-US","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}]}

Purchase options and add-ons

Brand SanDisk
Flash Memory Type Micro SDXC
Memory Storage Capacity 600 GB
Compatible Devices Smartphone
Color Red

About this item

  • Waterproof, shock and vibration proof, protected from airport x-rays, temperature proof
  • 400GB
  • Extreme Pro
  • Read speed: up to 170MB/s; write speed: up to 90MB/s
  • Operating temperature: -25ºC to 85ºC

Frequently bought together

$89.99
Get it as soon as Friday, May 31
Only 7 left in stock - order soon.
Sold by Memory-Warehouse and ships from Amazon Fulfillment.
Total price:
To see our price, add these items to your cart.
Details
Added to Cart
spCSRF_Control
Some of these items ship sooner than the others.
Choose items to buy together.

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

Feedback

SanDisk Extreme Pro Micro SDXC UHS-I U3 A2 V30 Memory Card + Adapter (400GB)

SanDisk Extreme Pro Micro SDXC UHS-I U3 A2 V30 Memory Card + Adapter (400GB)


Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?

Fields with an asterisk * are required

/
/
/
/
Please sign in to provide feedback.

Product Description

Class 10, UHS speed Class 3 (U3) and video Speed Class 30 (V30) for 4K Ultra HD (3840x2160p) and full HD video (1920x1080p) rescuepro Deluxe data recovery software downloadable offer

Compare with similar items

This Item
SanDisk Extreme Pro Micro SDXC UHS-I U3 A2 V30 Memory Card + Adapter (400GB)
SanDisk Extreme Pro Micro SDXC UHS-I U3 A2 V30 Memory Card + Adapter (400GB)
Recommendations
SanDisk 512GB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 190MB/s, C10, U3, V30, 4K, 5K, A2, Micro SD Card - SDSQXAV-512G-GN6MA
dummy
SanDisk 1TB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 190MB/s, C10, U3, V30, 4K, 5K, A2, Micro SD Card- SDSQXAV-1T00-GN6MA, Gold/Red
dummy
SanDisk 128GB Extreme PRO® microSD™ UHS-I Card with Adapter C10, U3, V30, A2, 200MB/s Read 90MB/s Write SDSQXCD-128G-GN6MA
dummy
SanDisk 64GB Extreme PRO® microSD™ UHS-I Card with Adapter C10, U3, V30, A2, 200MB/s Read 90MB/s Write SDSQXCU-064G-GN6MA
dummy
SAMSUNG PRO Plus microSD Memory Card + Adapter, 512GB MicroSDXC, Up to 180 MB/s, Full HD & 4K UHD, UHS-I, C10, U3, V30, A2 for Android Phones, Tablets, GoPRO, DJI Drone, MB-MD512SA/AM, 2023
Details
Added to Cart
spCSRF_Control
Details
Added to Cart
spCSRF_Control
Details
Added to Cart
spCSRF_Control
Details
Added to Cart
spCSRF_Control
Details
Added to Cart
spCSRF_Control
Details
Added to Cart
spCSRF_Control
Price$89.99$54.44$92.60$19.54$13.88$59.99
Delivery
Get it as soon as Friday, May 31
Get it as soon as Friday, May 31
Get it as soon as Monday, Jun 3
Get it as soon as Monday, Jun 3
Get it as soon as Thursday, May 30
Get it as soon as Thursday, May 30
Customer Ratings
Easy to install
4.7
4.7
4.7
4.7
4.7
4.7
Storage Capacity
4.7
4.6
4.6
4.7
4.6
4.6
Value for money
4.6
4.5
4.5
4.5
4.3
4.5
Durability
4.7
4.6
4.6
4.5
Easy to use
4.8
5.0
5.0
Sold By
Memory-Warehouse
Tech Stat
Amazon.com
MemoryWhiz
FC Ecom
Amazon.com
flash memory type
Micro SDXC
Micro SDXC
Micro SDXC
Micro SDXC
Micro SDXC
Micro SD
memory capacity
600 GB
512 GB
1 TB
128 GB
64 GB
512 GB
speed class
class 10
class 10
class 10
class 10
class 10
class 10
write speed
90 MB per second
130 MB per second
90MB/s
90MB/s
read speed
170 megabytes per second
190 megabytes per second
190 megabytes per second
200 megabytes per second
200 megabytes per second
180 megabytes per second

Looking for specific info?

Customer reviews

4.8 out of 5 stars
4.8 out of 5
62,925 global ratings

Customers say

Customers like the speed, quality, and value of the flash memory. They mention that it's extremely fast, reliable, and of very robust construction. They appreciate the 4K video quality, saying it'll produce excellent and fluid videos. They also appreciate the great capacity for the price and the 2 years free subscription of RescuePro Deluxe. Customers also mention that the performance is flawless, with no issues.

AI-generated from the text of customer reviews

217 customers mention186 positive31 negative

Customers like the quality of the flash memory. They say it has a very good storage, it's reliable, and has escaped many crashes. Customers also mention that the construction is very robust.

"Well made,speed is good and doesn't corrupt your pictures or videos." Read more

"Lots of storage and fast." Read more

"ITS ORIGINAL GREAT QUALITY PROTECTION PACKAGE" Read more

"I think that I have bought 6 of these to use in my drones. They are still perfect and I haven’t had any problems at all with them. Not a glitch...." Read more

192 customers mention170 positive22 negative

Customers like the performance of the flash memory. They say it works flawlessly, has no issues, and lives up to its advertised speeds. Some customers also mention that it works well for recording two video streams simultaneously at 4K/UHD.

"...testing, I used the card in my android smartphone, and it performed very well...." Read more

"It’s too small of a size to store 4K video but it performs fine" Read more

"...It is designed for XP and Vista, though it worked fine on my Win10. The program writes to and reads from the card...." Read more

"...Appears to be working just fine. 128 GB is the largest card the DJI Mavic 2 and their Smart Controller is rated to use...." Read more

151 customers mention135 positive16 negative

Customers like the speed of the flash memory. They say it's extremely fast, lives up to its advertised speeds, and doesn't corrupt pictures or videos. Some say it has no issues with overheating or slowing down. Overall, customers are satisfied with the speed and performance of the product.

"...test the full read speed, I am able to confirm that the write performance is consistent with none of the telltale behaviors of low quality NAND...." Read more

"Well made,speed is good and doesn't corrupt your pictures or videos." Read more

"Lots of storage and fast." Read more

"...No problems with read/write transfer speed. Fast FAst FAST!!!" Read more

92 customers mention83 positive9 negative

Customers appreciate the value of the flash memory. They say it has great capacity for the price and is the best value and quality they have found. Some customers also mention that the product is authentic and includes 2 years free subscription of RescuePro Deluxe.

"...For its modest cost, I highly recommend it!" Read more

"...the loss of time and related aggravation, this is a good card and worth the price...." Read more

"Got these for my DJI Mavic 3 Enterprise. Perfect amount of storage for sweet price. One of the many listed for use in the owners manual...." Read more

"...This memory card is a great value and will definitely purchase again" Read more

39 customers mention37 positive2 negative

Customers are satisfied with the video quality of the flash memory. They mention that it is awesome for 4K video, ultra high-def video, and 1080P HD video. They also say that it has no problem with recording 4K and 1020P HD videos with amazing precision.

"...We transferred 3000 photos with no problem. The pics are displayed flawlessly." Read more

"I use this memory card in my DJI mini 4 Pro Drone. Great for video’s and photo’s" Read more

"Purchased for my seno bluetooth camera and pictures are great." Read more

"...This card has no problem recording 4k and no issues handling anything the S9+ can do. Ordered a 256gb card as well for my own S9+...." Read more

14 customers mention9 positive5 negative

Customers are mixed about the size of the flash memory. Some mention that it's amazing, has plenty of space for a 4K video recording, and fits tons of HD video and pictures. However, others say that it’s too small of a size to store 4K videos and backup lots of photos.

"Easy to install into my Gopro Hero 8 and has plenty of space for my needs.I like it." Read more

"I bought it for a Samsung Galaxy S9 and it fits perfectly. Great quality and price. No problems at all. You can never go wrong with SanDisk." Read more

"It’s too small of a size to store 4K video but it performs fine" Read more

"Plenty of space for a 4k video recording, good look." Read more

authenticity and performance?
4 Stars
authenticity and performance?
My review is focused on the authenticity of this Extreme PRO micro SDXC A2 U3 and its performance vs. SanDisk claims.After purchasing this card, I looked online for ways to test its performance and I highly recommend that you do the same. There are plenty of fake SD cards being sold including from large online retailers such as this one. This is often and likely not the seller trying to scam buyers, but rather their vendor that opted for a sub-par product.My pursuit to find out if this indeed was a good purchase was not only driven by my curiosity, but by the mere fact that I find it difficult to justify paying $27 for something so small that you can smuggle it into a prison ..even with a full body cavity search. How did nobody think of this when Epstein allegedly offed himself?After watching a number of youtube videos, I downloaded several testing tools and ran my tests.Before I get into the testing, let me point to some of the more obvious physical aspects of a fake microSD card vs. a genuine one.1) On the outside of the package, look for misspelled words and generally things that stand out as low quality: print, images, and packaging seal.2) After you open the package, make sure the card and reader in the plastic form are sealed with a thin plastic on the back of it.3) The back of the reader should have a date and below that it should say, “Made is China.” The back of the microSD card should have a serial number and “Made is China” below that. Both are printed onto the plastic and are not stickers.4) On the back exterior of the package, in the top right corner, is a round icon that says, “Includes RescuePRO DELUXE 2-YEAR SOFTWARE DOWNLOAD OFFER.” When you open the package, you will see the sticker for this offer on the inside of the front of the package. If this sticker is missing or is instead “printed” onto the inside of that package, your SD is fake.Now, on to performance testing… You need to do this! And, be sure to do your testing before adding any data to the card. Though, you need to format the card first and if you’re formatting it via your phone, ONLY format it as an EXTERNAL STORAGE device. If you format it as internal storage, it will get encrypted and you will not be able to test it on any other device, other than the phone, nor will you be able to reverse this formatting choice. External Storage is also the recommendation from SanDisk.There are a bunch of free tools you can download and run on your PC for testing an SD card. And, there are some you can run on your smartphone. I’m not going to cover all of these, but I will touch base on the three I used. These tools are not great, though they will confirm if you got a genuine card and, they will set “real” expectations for your card’s Read and Write capabilities.First and foremost, back-up your computer and scan any & all software you download, before you install it. DO NOT skip this step!ChipGenius – this is a simple program that reads the manufacturer information on the card and displays it. This did not work for me on any level. Why? Because I do not have a slot for the SD card reader to insert into the laptop. Instead, I initially had to use a USB 3.0 adapter as an intermediary and ChipGenius came back giving me information on the USB flash drive as opposed to the reader and card plugged into it.And, a similar result when using the intermediary SanDisk USB reader (more on this below). Regardless, the manufacturer’s info can be altered using a disassembler app, so this tool is not great for affirming a fake, though it could be of value when used in conjunction with other tools.H2testw – this is an older program that still works and is popular. It is designed for XP and Vista, though it worked fine on my Win10. The program writes to and reads from the card. Unfortunately, this takes about 49 minutes for each test of Read & Write. I ran the test twice and got similar results. And, I ran it again using the SanDisk USB reader and the results on the Read were significantly better, though still not close to SanDisk claims.CrystalDiskMark – I called SanDisk and this is the tool their tech support recommended. It is a bit nicer layout and much faster than the H2testw, though I could not find a Win10 version. The 64bit XP version I downloaded worked well. I ran the tool several times.The results for H2testw were somewhat different from those of CrystalDiskMark, especially on the Read of the card. However, these results were all fairly consistent with those of the different performance-testing youtube videos I watched for this same card. In other words, 86 to 95 Mb/s on Read and 81 to 87 Mb/s on Write.Those numbers, and specifically the Read stats, are a far, FAR.. reach for the claims of what SanDisk says they are! The Read stats are HALF of what SanDisk says they should be. I know that the package says, “up to” those speeds, but that is what they should be when testing an empty card on a relatively new & fast laptop/PC. If you apply the same percentage for the Write results to the Read stats, they should be 153 to 164 Mb/s.I was somewhat surprised and a bit disappointed at the actual test results vs. the SanDisk claim. I started wondering if a different testing tool would produce different results and/or if perhaps this has something to do with my testing set-up. So, I contacted SanDisk and they sent me a new microSD card that performed the same on all these tests. After that, they sent me a SanDisk USB reader.I ran all of the performance tests using this SanDisk USB reader this time and the test results using CrystalDiskMark software exceeded the SanDisk claims for Read & Write speeds. See all of the attached photos.Now, as I see it, the real issue here is that SanDisk includes a cheap, flat card reader, which is not compatible with any device made today. In other words, you need an intermediary USB reader/adapter to actually test the card. And!, if you do not have one like the one SanDisk sent me (their own brand), your test results will not accurately reflect the Read & Write speeds of the card you bought.I’m giving this microSD card a 4 out of 5 stars because the thin, flat reader included with the card is basically a half-measure and of little value without that SanDisk USB reader. And, because I had to contact SanDisk to get this performance issue resolved, which took almost three months.Though despite the loss of time and related aggravation, this is a good card and worth the price. If you’ve read thus far, I thank you for your time and hope that my review is of value to you.
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Reviewed in the United States on January 10, 2022
Style: 128GBVerified Purchase
For this review, I will be testing with a Transcend RDF8 card reader. This reader tops out at around 93MB/s for sustained reads and writes (short bursts can reach 97MB/s), thus it is not capable of testing the max read speed of the micro SD card, but if it can consistently saturate the card reader across the drive, then it is a good indication of a genuine card.

For my testing I used AIDA64 with a linear write test from 0 to 100% fill. I find this to be a better way to test SD cards since it allows you to determine when a card is a fake or using QLC NAND, or very poorly binned TLC where only part of the capacity of the drive will perform at advertised speeds.

For reference, I performed some testing using my old 64GB Sandisk Extreme Pro micro SD card that I have confirmed to be genuine, and a key thing you will notice is consistent linear reads and writes across the entire capacity of the drive. The 64GB Extreme Pro has a slower write speed than the 128GB model, thus the true max write speed is measured.
Genuine Extreme Pro drives accomplish this by ensuring that the NAND is not a bottleneck for the controller, thus even as it gets full, it can maintain its write speeds.
Common counterfeit behaviors are cards that perform fast for a first few GB and then become very slow (Basically allocating part of the NAND in a pseudo SLC mode before you encounter the bad QLC performance). Other methods are taking a decent NAND bin that is a low capacity, e.g., taking a 32GB NAND package and formatting a 128GB+ partition table. In those cases a drive can benchmark well but corrupt all data as soon as you exceed its actual capacity.

Genuine reference (64GB Sandisk Extreme Pro micro SD) (I attached and labeled screenshots of the AIDA64 test):
Average read speed across the entire drive: 92.7MB/s
Average write speed across the entire drive: 87.5MB/s

Next I tested the 128GB Sandisk Extreme Pro micro SD card with the same Transcend RDF8 card reader. As expected, writes will be bottlenecked by the reader.

Average read speed across the entire drive: 93MB/s
Average write speed across the entire drive: 86.8MB/s

Overall, from my testing the card I received seems to be genuine, and the performance is in line with other Sandisk Extreme Pro micro SD cards. While I am unable to test the full read speed, I am able to confirm that the write performance is consistent with none of the telltale behaviors of low quality NAND.

As a final note, fakes will always change. Companies that make counterfeit cards can see examples of genuine ones and adjust their process to match the genuine part visually. What they can’t fake, is the performance, consistency, and capacity all at the same time. Know the limits of your card reader and test within those limits to ascertain whether your card is genuine or not. Counterfeit cards have the most trouble with write performance and consistency, thus longer write tests are most important.

For further testing, I used the card in my android smartphone, and it performed very well. Since Android is designed around limiting micro SD card use to tasks which have a lower IOPS demand by default. The vast majority of use cases will be for bulk storage, and saving larger files such as when you record 4K video.
The card had no problem keeping up with raw files being captured, as well as 4K video at 100Mbps (well within the write speed limit of the card (which in terms of Mbps, would be in the 700Mbps range)
Due to the performance and verification of it being genuine, I rate it 5 stars.
Customer image
5.0 out of 5 stars Great performance and capacity when you have a genuine card.
Reviewed in the United States on January 10, 2022
For this review, I will be testing with a Transcend RDF8 card reader. This reader tops out at around 93MB/s for sustained reads and writes (short bursts can reach 97MB/s), thus it is not capable of testing the max read speed of the micro SD card, but if it can consistently saturate the card reader across the drive, then it is a good indication of a genuine card.

For my testing I used AIDA64 with a linear write test from 0 to 100% fill. I find this to be a better way to test SD cards since it allows you to determine when a card is a fake or using QLC NAND, or very poorly binned TLC where only part of the capacity of the drive will perform at advertised speeds.

For reference, I performed some testing using my old 64GB Sandisk Extreme Pro micro SD card that I have confirmed to be genuine, and a key thing you will notice is consistent linear reads and writes across the entire capacity of the drive. The 64GB Extreme Pro has a slower write speed than the 128GB model, thus the true max write speed is measured.
Genuine Extreme Pro drives accomplish this by ensuring that the NAND is not a bottleneck for the controller, thus even as it gets full, it can maintain its write speeds.
Common counterfeit behaviors are cards that perform fast for a first few GB and then become very slow (Basically allocating part of the NAND in a pseudo SLC mode before you encounter the bad QLC performance). Other methods are taking a decent NAND bin that is a low capacity, e.g., taking a 32GB NAND package and formatting a 128GB+ partition table. In those cases a drive can benchmark well but corrupt all data as soon as you exceed its actual capacity.

Genuine reference (64GB Sandisk Extreme Pro micro SD) (I attached and labeled screenshots of the AIDA64 test):
Average read speed across the entire drive: 92.7MB/s
Average write speed across the entire drive: 87.5MB/s

Next I tested the 128GB Sandisk Extreme Pro micro SD card with the same Transcend RDF8 card reader. As expected, writes will be bottlenecked by the reader.

Average read speed across the entire drive: 93MB/s
Average write speed across the entire drive: 86.8MB/s

Overall, from my testing the card I received seems to be genuine, and the performance is in line with other Sandisk Extreme Pro micro SD cards. While I am unable to test the full read speed, I am able to confirm that the write performance is consistent with none of the telltale behaviors of low quality NAND.

As a final note, fakes will always change. Companies that make counterfeit cards can see examples of genuine ones and adjust their process to match the genuine part visually. What they can’t fake, is the performance, consistency, and capacity all at the same time. Know the limits of your card reader and test within those limits to ascertain whether your card is genuine or not. Counterfeit cards have the most trouble with write performance and consistency, thus longer write tests are most important.

For further testing, I used the card in my android smartphone, and it performed very well. Since Android is designed around limiting micro SD card use to tasks which have a lower IOPS demand by default. The vast majority of use cases will be for bulk storage, and saving larger files such as when you record 4K video.
The card had no problem keeping up with raw files being captured, as well as 4K video at 100Mbps (well within the write speed limit of the card (which in terms of Mbps, would be in the 700Mbps range)
Due to the performance and verification of it being genuine, I rate it 5 stars.
Images in this review
Customer image Customer image Customer image Customer image Customer image Customer image Customer image Customer image Customer image
Customer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer image
34 people found this helpful
Report
Reviewed in the United States on April 9, 2024
Well made,speed is good and doesn't corrupt your pictures or videos.
Reviewed in the United States on November 26, 2023
Style: 128GBVerified Purchase
It’s too small of a size to store 4K video but it performs fine
One person found this helpful
Report
Reviewed in the United States on March 11, 2024
Style: 128GBVerified Purchase
In preparing for our once-in-a-lifetime tour of South Africa and going on multiple safaris, I wanted to make sure my wife had enough "space" on her micro-SD card to take all the photos she desired. The 128GB Extreme Pro card met that requirement. Knowing it is a quality SanDisk product gave us an extra degree of comfort and confidence about it. For its modest cost, I highly recommend it!
Reviewed in the United States on March 21, 2024
Style: 128GBVerified Purchase
Lots of storage and fast.
Reviewed in the United States on March 25, 2021
Style: 128GBVerified Purchase
My review is focused on the authenticity of this Extreme PRO micro SDXC A2 U3 and its performance vs. SanDisk claims.

After purchasing this card, I looked online for ways to test its performance and I highly recommend that you do the same. There are plenty of fake SD cards being sold including from large online retailers such as this one. This is often and likely not the seller trying to scam buyers, but rather their vendor that opted for a sub-par product.

My pursuit to find out if this indeed was a good purchase was not only driven by my curiosity, but by the mere fact that I find it difficult to justify paying $27 for something so small that you can smuggle it into a prison ..even with a full body cavity search. How did nobody think of this when Epstein allegedly offed himself?

After watching a number of youtube videos, I downloaded several testing tools and ran my tests.

Before I get into the testing, let me point to some of the more obvious physical aspects of a fake microSD card vs. a genuine one.

1) On the outside of the package, look for misspelled words and generally things that stand out as low quality: print, images, and packaging seal.

2) After you open the package, make sure the card and reader in the plastic form are sealed with a thin plastic on the back of it.

3) The back of the reader should have a date and below that it should say, “Made is China.” The back of the microSD card should have a serial number and “Made is China” below that. Both are printed onto the plastic and are not stickers.

4) On the back exterior of the package, in the top right corner, is a round icon that says, “Includes RescuePRO DELUXE 2-YEAR SOFTWARE DOWNLOAD OFFER.” When you open the package, you will see the sticker for this offer on the inside of the front of the package. If this sticker is missing or is instead “printed” onto the inside of that package, your SD is fake.

Now, on to performance testing… You need to do this! And, be sure to do your testing before adding any data to the card. Though, you need to format the card first and if you’re formatting it via your phone, ONLY format it as an EXTERNAL STORAGE device. If you format it as internal storage, it will get encrypted and you will not be able to test it on any other device, other than the phone, nor will you be able to reverse this formatting choice. External Storage is also the recommendation from SanDisk.

There are a bunch of free tools you can download and run on your PC for testing an SD card. And, there are some you can run on your smartphone. I’m not going to cover all of these, but I will touch base on the three I used. These tools are not great, though they will confirm if you got a genuine card and, they will set “real” expectations for your card’s Read and Write capabilities.

First and foremost, back-up your computer and scan any & all software you download, before you install it. DO NOT skip this step!

ChipGenius – this is a simple program that reads the manufacturer information on the card and displays it. This did not work for me on any level. Why? Because I do not have a slot for the SD card reader to insert into the laptop. Instead, I initially had to use a USB 3.0 adapter as an intermediary and ChipGenius came back giving me information on the USB flash drive as opposed to the reader and card plugged into it.

And, a similar result when using the intermediary SanDisk USB reader (more on this below). Regardless, the manufacturer’s info can be altered using a disassembler app, so this tool is not great for affirming a fake, though it could be of value when used in conjunction with other tools.

H2testw – this is an older program that still works and is popular. It is designed for XP and Vista, though it worked fine on my Win10. The program writes to and reads from the card. Unfortunately, this takes about 49 minutes for each test of Read & Write. I ran the test twice and got similar results. And, I ran it again using the SanDisk USB reader and the results on the Read were significantly better, though still not close to SanDisk claims.

CrystalDiskMark – I called SanDisk and this is the tool their tech support recommended. It is a bit nicer layout and much faster than the H2testw, though I could not find a Win10 version. The 64bit XP version I downloaded worked well. I ran the tool several times.

The results for H2testw were somewhat different from those of CrystalDiskMark, especially on the Read of the card. However, these results were all fairly consistent with those of the different performance-testing youtube videos I watched for this same card. In other words, 86 to 95 Mb/s on Read and 81 to 87 Mb/s on Write.

Those numbers, and specifically the Read stats, are a far, FAR.. reach for the claims of what SanDisk says they are! The Read stats are HALF of what SanDisk says they should be. I know that the package says, “up to” those speeds, but that is what they should be when testing an empty card on a relatively new & fast laptop/PC. If you apply the same percentage for the Write results to the Read stats, they should be 153 to 164 Mb/s.

I was somewhat surprised and a bit disappointed at the actual test results vs. the SanDisk claim. I started wondering if a different testing tool would produce different results and/or if perhaps this has something to do with my testing set-up. So, I contacted SanDisk and they sent me a new microSD card that performed the same on all these tests. After that, they sent me a SanDisk USB reader.

I ran all of the performance tests using this SanDisk USB reader this time and the test results using CrystalDiskMark software exceeded the SanDisk claims for Read & Write speeds. See all of the attached photos.

Now, as I see it, the real issue here is that SanDisk includes a cheap, flat card reader, which is not compatible with any device made today. In other words, you need an intermediary USB reader/adapter to actually test the card. And!, if you do not have one like the one SanDisk sent me (their own brand), your test results will not accurately reflect the Read & Write speeds of the card you bought.

I’m giving this microSD card a 4 out of 5 stars because the thin, flat reader included with the card is basically a half-measure and of little value without that SanDisk USB reader. And, because I had to contact SanDisk to get this performance issue resolved, which took almost three months.

Though despite the loss of time and related aggravation, this is a good card and worth the price. If you’ve read thus far, I thank you for your time and hope that my review is of value to you.
Customer image
4.0 out of 5 stars authenticity and performance?
Reviewed in the United States on March 25, 2021
My review is focused on the authenticity of this Extreme PRO micro SDXC A2 U3 and its performance vs. SanDisk claims.

After purchasing this card, I looked online for ways to test its performance and I highly recommend that you do the same. There are plenty of fake SD cards being sold including from large online retailers such as this one. This is often and likely not the seller trying to scam buyers, but rather their vendor that opted for a sub-par product.

My pursuit to find out if this indeed was a good purchase was not only driven by my curiosity, but by the mere fact that I find it difficult to justify paying $27 for something so small that you can smuggle it into a prison ..even with a full body cavity search. How did nobody think of this when Epstein allegedly offed himself?

After watching a number of youtube videos, I downloaded several testing tools and ran my tests.

Before I get into the testing, let me point to some of the more obvious physical aspects of a fake microSD card vs. a genuine one.

1) On the outside of the package, look for misspelled words and generally things that stand out as low quality: print, images, and packaging seal.

2) After you open the package, make sure the card and reader in the plastic form are sealed with a thin plastic on the back of it.

3) The back of the reader should have a date and below that it should say, “Made is China.” The back of the microSD card should have a serial number and “Made is China” below that. Both are printed onto the plastic and are not stickers.

4) On the back exterior of the package, in the top right corner, is a round icon that says, “Includes RescuePRO DELUXE 2-YEAR SOFTWARE DOWNLOAD OFFER.” When you open the package, you will see the sticker for this offer on the inside of the front of the package. If this sticker is missing or is instead “printed” onto the inside of that package, your SD is fake.

Now, on to performance testing… You need to do this! And, be sure to do your testing before adding any data to the card. Though, you need to format the card first and if you’re formatting it via your phone, ONLY format it as an EXTERNAL STORAGE device. If you format it as internal storage, it will get encrypted and you will not be able to test it on any other device, other than the phone, nor will you be able to reverse this formatting choice. External Storage is also the recommendation from SanDisk.

There are a bunch of free tools you can download and run on your PC for testing an SD card. And, there are some you can run on your smartphone. I’m not going to cover all of these, but I will touch base on the three I used. These tools are not great, though they will confirm if you got a genuine card and, they will set “real” expectations for your card’s Read and Write capabilities.

First and foremost, back-up your computer and scan any & all software you download, before you install it. DO NOT skip this step!

ChipGenius – this is a simple program that reads the manufacturer information on the card and displays it. This did not work for me on any level. Why? Because I do not have a slot for the SD card reader to insert into the laptop. Instead, I initially had to use a USB 3.0 adapter as an intermediary and ChipGenius came back giving me information on the USB flash drive as opposed to the reader and card plugged into it.

And, a similar result when using the intermediary SanDisk USB reader (more on this below). Regardless, the manufacturer’s info can be altered using a disassembler app, so this tool is not great for affirming a fake, though it could be of value when used in conjunction with other tools.

H2testw – this is an older program that still works and is popular. It is designed for XP and Vista, though it worked fine on my Win10. The program writes to and reads from the card. Unfortunately, this takes about 49 minutes for each test of Read & Write. I ran the test twice and got similar results. And, I ran it again using the SanDisk USB reader and the results on the Read were significantly better, though still not close to SanDisk claims.

CrystalDiskMark – I called SanDisk and this is the tool their tech support recommended. It is a bit nicer layout and much faster than the H2testw, though I could not find a Win10 version. The 64bit XP version I downloaded worked well. I ran the tool several times.

The results for H2testw were somewhat different from those of CrystalDiskMark, especially on the Read of the card. However, these results were all fairly consistent with those of the different performance-testing youtube videos I watched for this same card. In other words, 86 to 95 Mb/s on Read and 81 to 87 Mb/s on Write.

Those numbers, and specifically the Read stats, are a far, FAR.. reach for the claims of what SanDisk says they are! The Read stats are HALF of what SanDisk says they should be. I know that the package says, “up to” those speeds, but that is what they should be when testing an empty card on a relatively new & fast laptop/PC. If you apply the same percentage for the Write results to the Read stats, they should be 153 to 164 Mb/s.

I was somewhat surprised and a bit disappointed at the actual test results vs. the SanDisk claim. I started wondering if a different testing tool would produce different results and/or if perhaps this has something to do with my testing set-up. So, I contacted SanDisk and they sent me a new microSD card that performed the same on all these tests. After that, they sent me a SanDisk USB reader.

I ran all of the performance tests using this SanDisk USB reader this time and the test results using CrystalDiskMark software exceeded the SanDisk claims for Read & Write speeds. See all of the attached photos.

Now, as I see it, the real issue here is that SanDisk includes a cheap, flat card reader, which is not compatible with any device made today. In other words, you need an intermediary USB reader/adapter to actually test the card. And!, if you do not have one like the one SanDisk sent me (their own brand), your test results will not accurately reflect the Read & Write speeds of the card you bought.

I’m giving this microSD card a 4 out of 5 stars because the thin, flat reader included with the card is basically a half-measure and of little value without that SanDisk USB reader. And, because I had to contact SanDisk to get this performance issue resolved, which took almost three months.

Though despite the loss of time and related aggravation, this is a good card and worth the price. If you’ve read thus far, I thank you for your time and hope that my review is of value to you.
Images in this review
Customer image Customer image Customer image Customer image Customer image Customer image
Customer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer image
65 people found this helpful
Report
Reviewed in the United States on May 12, 2024
We bought this SD card for our digital frame. We transferred 3000 photos with no problem. The pics are displayed flawlessly.
Reviewed in the United States on May 13, 2024
Style: 128GBVerified Purchase
The Sandisk products are always just as advertised

Top reviews from other countries

Translate all reviews to English
Willian Medeiros
5.0 out of 5 stars Excelente
Reviewed in Brazil on March 17, 2024
Style: 128GBVerified Purchase
Recomendo, produto de excelente qualidade.
Mountain Biker
5.0 out of 5 stars Affordable and reliable card with lots of storage for phones and tablets
Reviewed in Canada on December 10, 2023
Style: 128GBVerified Purchase
I've been using SanDisk products in my cameras for about 20 years and I've never had one fail me. I bought this card to put it into my tablet, so I download plenty of media onto it to keep me occupied on long flights. Works like a charm...no issues!
Eduardo Machado
5.0 out of 5 stars Produto original, verifiquei com a Sandisk!
Reviewed in Brazil on November 15, 2023
O cartão é original, conforme informado pela Sandisk após envio de fotos do produto e sua respectiva embalagem, podem confiar!
"Temos o gosto de informar que, com base nas informações providenciadas, seu cartão de memória é um produto original SanDisk! Para além disso, ele dispõe de garantia vitalícia."

O produto é excelente, estou utilizando em meu drone.
FGB PSIC
5.0 out of 5 stars Muy buena memoria
Reviewed in Mexico on November 2, 2023
Style: 400GBVerified Purchase
Es de alta velocidad y transfiere y almacena perfectamente mis videos.
Don E
5.0 out of 5 stars Reliable memory
Reviewed in Canada on June 30, 2023
As advertised. Formatted and works in my drone well.
One person found this helpful
Report