Amazon.com: Customer reviews: SanDisk 64GB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 160MB/s, C10, U3, V30, 4K, A2, Micro SD

Top positive review

Does what it’s supposed to.

Reviewed in the United States on March 14, 2024

Basically it does what it’s supposed to do. I got this as a spare for my drone, and it works great. After years of using it’s still working flawlessly.
I know you can probably catch this listing cheaper on one of the sale days that happens every so often. But overall if you live in BFE like I do, and have to go extremely out of your way to a Walmart at the best scenario, for the possibility they don’t even have what you need with select specs you need, could be out of stock, or just don’t carry what you are looking for. It’s just simpler to shop online, and order it and forget it, at least until it arrives.
Overall I can’t complain one bit with this purchase! Got exactly what I was looking for, and even needed, price was fine, quality was good, specs was solid, everything was good! So yeah solid buy in all honesty. Fully recommend.

Top critical review

Critical reviews›

Shylon Barnes

SWITCH OWNERS BEWARE

Reviewed in the United States on June 12, 2022

This SD card definitely does what it's supposed to do. However, if you intend to use this on your Nintendo Switch, such as myself, then you'll soon be met with a few complications that using an SD card with such high storage capacity can produce. The one blaring issue is that 9 times out of 10, once you get a game installed it'll turn out to be corrupt and then you'll have to reinstall it and hope that it's just not corrupt this time. This is mainly due to the fact that 1TB really is a lot of space and that alone makes it way more likely that your downloads WILL BE corrupt. I suggest buying a 512 GB SD card instead in order to avoid this head ache all together. Having to install a game upwards of 5 times, especially when it's a larger game, only to have it still not function properly is a definite hassle that I really don't think is worth it. I have well over a hundred games from the eshop for my switch. The total space they take up when they are all installed is about 585 GB. I'm a crazy person who buys games all willy nilly, so I don't expect the average switch user to even come anywhere close to actually needing a 1TB card. 512 will be much better, I promise.

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349,960 total ratings, 32,948 with reviews

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From the United States

Fyhy

Does what it’s supposed to.

Reviewed in the United States on March 14, 2024

Style: Card OnlyCapacity: 128GBVerified Purchase

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BigDaddy050970

Top-of-the-Line Performance and Impressive Storage Capacity

Reviewed in the United States on May 8, 2023

Style: Card OnlyCapacity: 512GBVerified Purchase

The SanDisk 512GB Extreme microSDXC UHS-I Memory Card with Adapter is a reliable and high-performance storage solution for various devices, including smartphones, tablets, and cameras. As an AI language model, I have not personally used this product, but I have analyzed expert reviews and customer feedback to provide an informative and unbiased review.

The card offers an impressive 512GB of storage capacity, providing ample space for storing photos, videos, music, and other files. It boasts read speeds of up to 160MB/s and write speeds of up to 90MB/s, making it ideal for capturing and transferring high-resolution content quickly.

The memory card is also durable and can withstand various environmental conditions, including water, temperature, shock, and X-ray. It comes with an adapter, allowing you to use it with devices that support standard SD cards.

Customers who purchased this product are generally pleased with its performance and reliability. Many users appreciate the large storage capacity and fast data transfer speeds, especially when capturing high-quality photos and videos. Some users also mention that the card works well with drones, GoPros, and other action cameras.

Overall, the SanDisk 512GB Extreme microSDXC UHS-I Memory Card with Adapter is a top-of-the-line product that offers impressive storage capacity and fast performance, making it an excellent choice for anyone who needs reliable and high-performance storage for their digital devices.

3 people found this helpful

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John E

Test results - Amazon basic 256 vs SanDisk Extreme 256 (with earlier cell phone usage review)

Reviewed in the United States on May 12, 2019

Style: Card OnlyCapacity: 128GBVerified Purchase

I am reviewing and comparing two different memory cards, the Amazon basics 256gb and the SanDisk Extreme 256gb card.

First is price, the Amazon basics is a several dollars less than the SanDisk (at this moment 23.72 vs 36.99). Currently Amazon says there is a newer version of the SanDisk for 24.85, however I have not purchased or tested the newer version.

The two cards:
"SanDisk 256GB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 160MB/s, C10, U3, V30, 4K, A2, Micro SD - SDSQXA1-256G-GN6MA"
"Amazon Basics microSDXC Memory Card with Full Size Adapter, A2, U3, Read Speed up to 100 MB/s, 256 GB"

Tested using:
CrystalDiskMark 5.5.0 x64.
Computer is a 4-year-old "NUC8i7HVK" running Windows 10, and it has a built in SD card reader (Intel calls it "SDXC with UHS-I support"). This interface is what I call "SD reader" in the accompanying screen captures.
I also tested using a SanDisk USB 3 adapter "SanDisk MobileMate USB 3.0 microSD Card Reader- SDDR-B531-GN6NN". This interface is what I call USB3 in the accompanying screen captures.

First, I noticed a UK review where the reviewer noted the Amazon basics card seems to be missing 5 gigabytes of storage even when the (confusing) translation from computer storage gigabytes (1024 x 1024 x 1024 = 1,073,741,824 bytes vs 1000 x 1000 x 1000 = 1,000,000,000 bytes) vs "we sell storage" gigabytes.
You will notice CrystalDiskMark reports the Amazon basic card as 233GiB versus the 238GiB of the SanDisk, so he is very correct. I have no clue why the discrepancy, but it is slightly smaller than it should be.

Second, to get the real read/write speed of the SanDisk card, you will notice I had to use the SanDisk USB 3 adapter. Using the built in SD card reader, both cards were very close to identical results.
Using the SanDisk USB 3 adapter, I did manage to exceed the ratings for the SanDisk card (up to 160 MB/s read, and up to 90 MB/s write) giving 169 read and 105 write. The Amazon basic card did have a slight change using the SanDisk adapter, but really not significant.

Both cards were close enough to their claimed specs to not worry about it, however it should be noted that you need the SanDisk adapter to actually get the much higher speeds of the SanDisk.
I will be using the Amazon basic card to store children's movies for my granddaughter to play on her new Kindle, it is plenty fast enough reading to do full HD movies.

Note that both cards were brand new when tested and had never had anything written or read from them prior to the test. The Amazon basic seems a good value and is certainly adequate for normal use in a cell phone or laptop. The SanDisk would really shine if you used the adapter to move lots of larger files to it.

Older review:
I've now purchased this card 3 times from Amazon (as seller) and I'm very satisfied. Used in Moto g7 and Moto g7 power phones with excellent results!
Mine was sold by Amazon, and certainly is a fast card. Installed in a Moto G7, tested at 89 read, 59 write using A1 SD benchmark for android. Maybe not the rated speed, but Motorola phones have a history of bad SD compatibility. Tested others, and this card is significantly faster. Very happy with the product.
Note that I've attached some results testing on a PC with a Lexmark reader, thus it doesn't attain its full speed.

9 people found this helpful

Helpful

Mike

SanDisk 128GB Extreme microSDXC UHS-I Memory Card

Reviewed in the United States on February 17, 2024

Style: Card OnlyCapacity: 128GBVerified Purchase

Very hard to give a reasonable evaluation of how much BETTER, than my other cards, would say it is very good, great capacity. All in all, think it is better than my extreme, and much better than Ultra.

One person found this helpful

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A. Cruz

Good Card, Accurate Speeds

Reviewed in the United States on March 12, 2021

Style: Card OnlyCapacity: 128GBVerified Purchase

In short this is a great card and it's speed falls close to it's advertised speeds.
ADVERTISED ACTUAL
READ: 160 MB/s 149 MB/s (93.13% of advertised speed)
WRITE: 90 MB/s 109 MB/s (121.11% of advertised speed)

The results above are from the SanDisk Extreme 128 GB card, SDSQXA1-128G-GN6MA bought in Q1 of 2021.

Unfortunately, there are MANY fake SanDisk cards on the market everywhere and they can be very problematic if bought and used. I highly suggest you test ANY sd card that you buy. In general, I always want to get at least 90% of claimed speeds. Different hardware or software optimizations can make it to where you may not get speeds as high as claimed, but if you are close to them, close is good enough.

Only read on if you are researching SD cards and verification or are just a nerdy person like myself.

When looking up SD cards it's important to keep a few things in mind:
* Investigate the claims for speed if it is important to you. The card may say xxx MB/s write speed* That asterisk may reference that the speed is only guaranteed when using a certain software. Since you might be like me and installing the card into a phone, that phone will most likely not use that software so the speeds will be lower. For a more real-world speed, look at reviews who have verified the speeds either in the device that you plan to use it in, or by other software to benchmark it.

* Always test the speed of the card once you get it (The speeds above come from a program known as H2testw)
* Always test the storage capacity of the card.

* I highly recommend that you test your card using H2testw. It tests the two most important things about your storage: actual speeds, and actual storage. Fake or faulty cards cannot hit their advertised speeds. Fake cards often are edited to report a false storage to your computer. Say you buy a 128GB card and you read the size in Windows, 119 GB. Seems close enough right? Well this is not a guarantee of the real storage capacity. The card could be a 4 GB card that is written to report itself as 119 GB. For the first 4 GB of space or so there will be no issues with the card, aside from likely slow speeds, since fake cards often use slower, cheaper memory. After writing these 4 gigabytes however, you will inevitably have data corruption. The original 4 GB stored on the card will start to be overwritten by the next data to come. This can result in a total loss of date. This is the big danger with fake cards. It's one thing to have a slow card, but another thing entirely to lose your data. You could lose valuable data and there are times when this data cannot be recovered.
* Know that your storage space will always be less than advertised. In my case, my 128 GB card has an actual storage space of 119 GB. This is in mainly due to the fact that the advertised capacity is often the unformatted, "RAW" size in decimal (base 10) storage. However, your computer reads storage in binary (base 2) storage. In this case, if we take 128 GB of decimal gigabytes and convert it to binary gigabytes, we get 119.21 binary gigabytes. When your card is formatted, it is formatted using base 2 since your computer understands binary. Decimal is essentially only used for advertising as far as us typical consumers are concerned. H2testw will test the true capacity by filling the entire card with however much information it can put into it, then reading it back and verifying that the information stored is correct. A fake card may be 4GB and allow 119GB to be written to it, but when the information is checked, there will be discontinuities in the data and the fake card will be exposed as such.

Good luck finding a card that works for you.

15 people found this helpful

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Cindy Williams

SD card

Reviewed in the United States on April 13, 2024

Style: Card OnlyCapacity: 128GBVerified Purchase

Works good

Helpful

Carroll Charleston

This is a very good value and very reliable

Reviewed in the United States on February 17, 2024

Style: Card OnlyCapacity: 128GBVerified Purchase

You can not go wrong with the extreme version from SanDisk. This version is very reliable and now have had a year and it is always fast to read and write

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Brian

Fast shipping.

Reviewed in the United States on April 7, 2024

Style: Card OnlyCapacity: 256GBVerified Purchase

Great product!

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Snake Eater

Works fast with Steam Deck

Reviewed in the United States on September 9, 2022

Style: Card OnlyCapacity: 512GBVerified Purchase

Got the 512 GB model to expand on the Steam Deck's admittedly limited storage. Even if you got the largest storage model of the Deck (512 GB) it can fill up quickly. Games are just bigger nowadays. I think the newest Call of Duty is like 150 gigs.

Just like every storage manufacturer, they advertise the storage in "GB" instead of "GiB", so when you actually plug it into a computer you lose some space in the conversion. In this case, after you format it on the Steam Deck (ext4 I believe) you end up with 468.2 GB of usable space. Which admittedly is a tiny bit bigger than the Deck's own 465.3 GB of usable space on the 512 model. It seems like every storage mfr. has their own way of making this GB/GiB calculation, and it's just plain annoying how they always favor giving you less storage than it says on the label. It's so common now it's pretty much standard practice with them, so what can you do. But losing 9% of your storage space is never fun, so it's always worth complaining about again.

The largest game I have loaded on this card is Horizon Zero Dawn Complete Edition, which is 73.48 GB. And the stories are true, it loads pretty much just as fast as the Steam Deck's own SSD. The game's intro comes with a few somewhat lengthy cutscenes, and game developers have gotten pretty good at hiding the loading screens in the background now, but still there was absolutely no wait at all between gameplay sections. In fact, I have another older game "Destroy All Humans!" (2005) on the Deck's SSD that has more hard loading screens, and it just "feels" like it takes longer to launch and load new levels than Horizon Zero Dawn on the micro SD card. HZD had a few times where it would stutter during the intro cutscenes, and drop to 20 FPS very momentarily, but for some reason this seemed to clear up after about 30 mins in, and otherwise ran at around 35-45 FPS. Definitely watchable. Gameplay was much smoother, had absolutely no stutters, and ran really consistently at around 40 FPS. Definitely playable.

And not all of that may be down to the card. I'm not sure if Horizon Zero Dawn uses pre-rendered cutscenes or not (basically a video file), but it might explain the odd stuttering that only happened during cutscenes, and not during gameplay. However you would think streaming even a 4k video file should be easy, stutter-less task for this card. Another reason could be Steam's own weird download behavior: if you want to download multiple games at the same time to load your new card up, each time you click "Install" on a new game, Steam will interrupt whatever download it was currently working on and immediately start downloading the game you just clicked on, putting whatever it was downloading before into a queue. As far as I know, there's no way to just add games directly to the queue, to have them each download 1-at-a-time uninterrupted. If there is that option I haven't found it yet. (You would think this would be the default behavior anyway.) This means when I clicked on 8 different games to start downloading at the same time, each time I clicked on the next one it would pause the current download at around 1% complete, and only pick it back up again once the last one I clicked on completed. This causes pretty bad fragmentation in your game data, with the first 1% of 8 different games stored at the beginning of the card. But it could explain the rare stuttering in the intro cutscenes that somehow miraculously cleared up after a little while. Solid-state storage is supposed to have much better random IOPS read performance than HDDs, but no matter what when you've got fragmented data you're going to get slower speeds than continuous reads.

FYI, you can transfer games between 2 different micro SD cards directly on the Deck. I was using a temporary 64 GB card while waiting until this one arrived, and my Windows computer couldn't read the ext4 or whatever filesystem Deck uses, and I didn't want to mess around with new drivers to get that to work. But with a few USB-C to USB-A adapters and micro SD card reader, it's easy to do on the Deck itself. It won't show up on the Deck's Storage menu of the main interface, so you have to hold the power button down and switch to Desktop mode, where you can use the standard file browser to copy things over. Keep this in mind before you start troubleshooting your wonky series of daisy-chained adapters/card readers because you think they aren't working. And make sure you format the new card first.

Another FYI: I had a little scare thinking I bricked my Deck or something when I first installed this card. I made sure to completely shut down the Deck before swapping SD cards, but I think that confused the bootloader. When I turned it back on the Deck had a completely blank, black screen, and Steam didn't load. It turned out the boot order somehow got switched, and it was trying to find the Steam OS on the new microSD card instead of the Deck's SSD. To fix this is easy, while it's off hold 'Volume Down' and click the Power Button - when you hear the chime, let go of the Volume Down button, and you'll be booted into the Boot Manager. There you can fix the boot order, and I haven't had it happen again since. Just search "steam deck recovery" online for more info, Valve has great instructions.

104 people found this helpful

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MDuck

I prefer Samsung but this was cheaper and A2 rated

Reviewed in the United States on October 18, 2020

Style: Card OnlyCapacity: 128GBVerified Purchase

I haven't had good luck with Sandisk micro SD cards. I haven't had any failures but these are my two issues:

1. On large file transfers - more than 1gb - Sandisk tends to overheat and lose transfer speed. This is worse writing TO the card than reading from it. Transfer speeds are stil ok, but nothing like the speeds I get from my USB 3.1 port with a thumbdrive. Several years ago the problem was so severe my files got corrupted even when the on-board thermal protection was throttling my transfer speeds down to 5-10 megabytes per second. In the past two years data loss has ceased to be a problem, and the speed hit on large file transfers is much less severe, although Samsung continues to run faster, in real life big file transfers, than San Disk, at least for me.

2. I don't think Sandisk really meets the specs required for "extendable" or "unified" storage on Android, that or it throttles so early the perfomance on small, constant file reads and writes suffers more than it should. I almost always get an error message with their A1 cards on budget (Qualcom 42x chipset) phones complaining the storage is slow and hence not optimal as unified storage. I haven't gotten this error message with my two Fire HD 10 9th gen tablets on this latest A2 iteration, however, which may be a function of the chipsets and memory controller used in these tablets or maybe the upgrade from A1 to A2 makes a difference.

I purchased two Fire HD 10's, 2020 editions/9th gen (the second one purchased on Prime Day for just $80, which is insanely cheap) and two of these A2 class Sandisk 128gb micro SD cards.

A2 means the memory controller built into the micro SD card should be fast enough to run apps (not gaming apps!) from the card, not just read storage data.

The real challenge is for app-rated (A1 or A2) card to handle data reads and writes for multiple apps at the same time. "Same time" is critical - it's not reading a single big file that creates problems for micro SD cards, it's reading small files at nearly the same time to handle the needs of multiple apps running at the same time. The way to avoid any performance issues is to NOT allow the operating system to "move" apps from true internal storage to the SD card. Only data.

The first 128gb drive installed perfectly easily in my first Fire as "portable" or "removable" storage but that is not surprising. The second card was installed as "internal storage" in the second Fire glitched several times, crashing once, and not recognized by the tablet as storage at all. I don't know what I finally did to get past the glitches. but as far as I can tell what finally worked was first formatting it as "portable" storage first, rthen ebooting, then re-formatting it as "internal" storage.

I was "offered" a chance to move some apps onto the SD card after formatting as internal storage. DO NOT do this - the 32gb of internal, faster storage is a much better place to run apps from, not the SD card even though it is A2 "app-friendly" classified. All CONTENT will automatically go to the SD card in the future, such as downloaded Netflix and Prime Videos.

Pay attention to the following issues which might develop:

1. Simultaneously downloading videos or other content AND watching a previously stored video. This can tax the memory controller in the SD card since essentially the device is attempting to read your video and write your downloading episodes at the same time (subject to buffering). It shouldn't be a problem,but it might. I usually download content when I'm not using the tablet.

2. Moving lots of content from external storage - like a thumb drive - to internal storage. The process is ALWAYS a lot faster going from USB 3 thumbdrives to internal factory storage, and slower when writing to the SD card.

In my review title I mentioned I prefer Samsung. Without doubt they make more dependable SD cards that more consistently "hit" their specs and don't throttle down as much on large file transfers. However, Sandisk pretty much "owns" the A1 and A2 "app friendly" micro SD space, and they frequently go on sale. Since they no longer "corrupt" large file transfers (I'm talking about moving a 30gb music collection to an SD card in a computer, not just a couple of gb), I no longer avoid Sandisk like the plague. Still, as they say, once burned twice wary.

I'm hunting for reviews from Raspberry Pi users. Running an actual operating system from a micro SD card is equally hard, or harder, than running Android apps. So far, the micro SD cards recommend for those Raspberry Pi systems are NOT A1 or A2 class or even necessarily "faster" micro SD cards - apparently speed on larger files doesn't necessarily correlate to the speed required for smaller, constant file transfers that an operating system needs.

It's good to see micro SD card prices become so low and commodity-like. I can remember when cards were a dollar a gigabyte, or much more. For under $20 I'm more than willing to give this Sandisk A2 128gb micro SD card a workout in my Fire HD 10 9th gen.

I'm also a little surprised to see all the new brand names. I'm used more to Samsung and Sandisk at the top, with Kensington, Patriot, etc. as the next tier. My guess is Chinese subcontractor factories feel less bound to have a long-standing brand name and are just going direct to market. Time will tell how this works out for consumers.

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SanDisk 64GB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 160MB/s, C10, U3, V30, 4K, A2, Micro SD - SDSQXA2-064G-GN6MA

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