Amazon.com: Customer reviews: SanDisk 256GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-256G-GN6MA
Skip to main content
Try Prime
EN   Hello, Sign in Account & Lists Sign in Account & Lists Orders Try Prime Cart
All
Select the department you want to search in
Go
Hello Select your address
12 Days of Deals Best Sellers Find a Gift Customer Service New Releases Registry Gift Cards Sell AmazonBasics Coupons Whole Foods Free Shipping Shopper Toolkit #FoundItOnAmazon

  • SanDisk 256GB Ultra MicroSDXC UHS-I Memory Card with Adapter -...
  • ›
  • Customer reviews

Customer reviews

4.6 out of 5 stars
4.6 out of 5
26,601 customer ratings
5 star
83%
4 star
7%
3 star
2%
2 star
1%
1 star
7%
SanDisk 256GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-256G-GN6MA

SanDisk 256GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-256G-GN6MA

bySanDisk
Capacity: 256GBStyle: SingleChange
Price:$37.31+ Free shipping with Amazon Prime
Write a review
Add to Cart

Add to Wish List

Top positive review

See all 21,080 positive reviews›
Jeffrey Fahndrich
4.0 out of 5 starsBelieve the "Fake Card" Hype - Photo to Prove It
September 30, 2018
Top card doesn't work / Bottom card works. Bought the top card June 18 2018 for a Nintendo Switch and the games would download to 99% and then suddenly I'd get an error. When these cards went on sale recently I bought a new one just to see if it was the card. I could not BELIEVE how different the fonts were! Check out photo. Also the color of the bad card is off (slightly more purple and less red). Sure enough, I was able to download games to the new card without incident. The real product works great but I just can't justify giving 5 stars when I had this experience. Buyer beware!
Read more
1,832 people found this helpful

Top critical review

See all 2,580 critical reviews›
Barbara A Botts
1.0 out of 5 starsDefective card
August 13, 2018
After trying and trying repeatedly to use this microcard as a replacement in my Samsung S7 - hours of frustration, seeking guidance from internet, friends, etc. I gave up, thinking it was just my ineptitude. Tried again several times, it would never work.
Finally, decided to try a different/new card. Sure enough...worked right away! So, by now the 128 GB card ordered May 2, is well past its "return by" date, when I determine it is defective. Now what do I do? Searched on Amazon, but found no instructions for this situation.
Giving it 1 star in hopes this can be rectified. I use SanDisk cards all the time and have never had a problem like this before.

Just found out from SanDisk that this card is a fake - not their product. Guess I am screwed unless Amazon steps up and makes it
good. Need to somehow punish this seller "Lecu Computer" for giving Amazon a bad name and customers a bad product!
Read more
1,423 people found this helpful

Search
Sort by
Top rated
Filter by
All reviewers4 star onlyAll formatsText, image, video
Showing 1-10 of 1,564 reviews(4 star). Clear filter

There was a problem filtering reviews right now. Please try again later.

Jeffrey Fahndrich
4.0 out of 5 starsBelieve the "Fake Card" Hype - Photo to Prove It
September 30, 2018
Capacity: 200GBStyle: SingleVerified Purchase
Top card doesn't work / Bottom card works. Bought the top card June 18 2018 for a Nintendo Switch and the games would download to 99% and then suddenly I'd get an error. When these cards went on sale recently I bought a new one just to see if it was the card. I could not BELIEVE how different the fonts were! Check out photo. Also the color of the bad card is off (slightly more purple and less red). Sure enough, I was able to download games to the new card without incident. The real product works great but I just can't justify giving 5 stars when I had this experience. Buyer beware!
review image
1,832 people found this helpful
Helpful
1818 comments Report abuse
Comment

There was a problem loading comments right now. Please try again later.

    Showing 0 comments
    Sort by:
  • Newest
  • Oldest

There was a problem loading comments right now. Please try again later.


Markus
4.0 out of 5 starsThe card was tested with H2testw and as you can ...
November 25, 2017
Capacity: 200GBStyle: SingleVerified Purchase
Sandisk Ultra 200GB Micro SDXC UHS-I Card with Adapter - 100MB/s U1 A1 - SDSQUAR-200G-GN6MA
The card was tested with H2testw and as you can see, the long-term averaging resulted in 31.9MB/s write and 87.6MB/s read speed. Fast enough for use in phones and tablets and your Nintendo Switch.
Card tested successfully at full capacity. The card was received in full retail packaging and seems to be genuine. Item was received promptly and packaged appropriately.
review image
156 people found this helpful
Helpful
11 comment Report abuse
Comment

There was a problem loading comments right now. Please try again later.

    Showing 0 comments
    Sort by:
  • Newest
  • Oldest

There was a problem loading comments right now. Please try again later.


Morgan Fleur De Lys
4.0 out of 5 starsPlaced in Nintendo Switch, Got 363 GB of Usable Space
December 3, 2018
Capacity: 400GBStyle: SingleVerified Purchase
So these cards, like many like them are always advertised based on technicalities and I don't like that. So when it says 400 GB be aware you're never going to get that.

I bought this card because at the time of purchase this was the highest capacity card that's compatible with the Nintendo Switch. I bought a used one to save a bit of money and so far, so good.

When you place it in your Nintendo Switch, you should get about 363 GB of usable space. That's a lot of GB but it's also 37 GB less than the capacity SanDIsk is marketing it as and for that reason alone, because 37 GB is not a trivial amount, I'm giving this card a 4-star rating.

Other than that, it's fine.

Finally, your Nintendo Switch will need to do a software update in order to use this card but don't worry because it will do it automatically and with just a few button clicks you'll be good to go within seconds.

NOTE: This card inserts at the bottom of your Switch under the kickstand, NOT on top where the games go.
11 people found this helpful
Helpful
22 comments Report abuse
Comment

There was a problem loading comments right now. Please try again later.

    Showing 0 comments
    Sort by:
  • Newest
  • Oldest

There was a problem loading comments right now. Please try again later.


Amazonn Costumerr
4.0 out of 5 starsConsider what you are gonna use this card for before buying
January 24, 2019
Capacity: 128GBStyle: SingleVerified Purchase
Bought this with a dash cam (It showed the two items were "frequently bought together") on Amazon. This card is not for dashcam use, infact, if you use it for dashcams or video monitoring devices(security cameras), Sandisk will void the warranty of the SD card. I did not know this and will have no choice but to return this product. It would be nice for Sandisk to put in the description "NOT FOR USE FOR DASH CAM OR VIDEO MONITORING DEVICES" and direct the consumer to their "Sandisk High Endurance" card, specifically made for dash cams/security cameras. I had to do the research myself and learn that this cards will die faster if used with dash cams because they require continuous writing and rewriting on the card (Loop recording, ect) I'm sure the product is beneficial for other devices, but don't use this for dash cams!!
7 people found this helpful
Helpful
0Comment Report abuse
Comment

There was a problem loading comments right now. Please try again later.

    Showing 0 comments
    Sort by:
  • Newest
  • Oldest

There was a problem loading comments right now. Please try again later.


Twiddles42Top Contributor: Doctor Who
4.0 out of 5 starsWorks in Galaxy Note9 (but sees the card as 366GB when formatted)
August 27, 2018
Capacity: 400GBStyle: SingleVerified Purchase
Notice: Review is subject to change if problems occur down the road. Never had an issue with Sandisk before, though.

I checked online for images to compare, my 400GB card and packaging look legitimate. Buy from Amazon directly if there's a concern about hardware piracy. This 400GB model had Amazon Services Inc as the seller and was eligible for Prime so I'm certain it's authentic.

I'm not alone in reporting that the FORMATTED capacity of the card is 366GB. These disks do tend to sell advertising the unformatted capacity.

Took me a while to get the card into the caddy on my Note9, but booting up the phone after installing, I had no problems accessing data I'd copied to it earlier - 1800 camera photos appear rather fast. I didn't run any professional benchmark tests but it's faster than the 256GB card I was using before when loading. Wow.

Reading others' reviews, heating may be an issue. I only use the card for backup purposes but will keep an eye on it. Frequent/heavy use might be a concern, and given the tiny size of these cards, heating would become an issue.

For $160, seems a good deal. Better than $260 for the same card elsewhere or even $360 for the 512GB version -- but there are times for the extra capacity that necessitate the cost. 400GB (or, rather, 366 formatted) is rather nice, especially for the snappier speed.
7 people found this helpful
Helpful
11 comment Report abuse
Comment

There was a problem loading comments right now. Please try again later.

    Showing 0 comments
    Sort by:
  • Newest
  • Oldest

There was a problem loading comments right now. Please try again later.


C. Okamuro
TOP 1000 REVIEWERVINE VOICE
4.0 out of 5 starsGreat value in terms of storage per dollar, but SLOOOOOW. Conditionally recommended.
April 20, 2019
Capacity: 200GBStyle: SingleVerified Purchase
MicroSD cards are a little odd in how versatile they are. You can use them with adapters in DSLRs or as secondary storage in a laptop with an SD slot. You can use them in phones, game systems, and other devices (dashcams, action cameras, security cameras). The versatility means that you can have dramatically different requirements from use case to use case, and that a specific MicroSD product may be good for one, but not another. What about the SanDisk Ultra 200GB microSDXC UHS-I card?

If I'm being completely honest, I wasn't in the market for a high-capacity MicroSD card. I was on a Kinja site and saw mention of a really good deal on these cards, so I bought a couple of them. I knew when I bought them that they are a tier or two down from SanDisk's Extreme Pro line, but I was going for value at capacity, not raw speed.

That's the rub, really... the cards are not fast. How slow are they? Though ATTO isn't the best tool for measuring MicroSD cards, I've still included a screen grab of the testing run. Writes max out around 50MB/s, and reads at around 80-ish MB/s. That's a far cry from the 100 MB/s write / 115 MB/s read that you'll get by spending more on a faster card, especially when you look at what happens to the speed of this item with SMALL random write and reads.

So, who is this for? Well, if you're looking for large storage to add to your phone or tablet, this is a good buy. It's also good for non-DSLR cameras of almost any type. What it's not as good for is to use as primary or secondary storage for a PC or laptop. It also wouldn't be a good choice for DSLRs, in my opinion. If performance is your primary need, you should look elsewhere, as there are faster choices. However, if you're ok with the speed penalty, this is a solid product, and I recommend it.
review image
4 people found this helpful
Helpful
0Comment Report abuse
Comment

There was a problem loading comments right now. Please try again later.

    Showing 0 comments
    Sort by:
  • Newest
  • Oldest

There was a problem loading comments right now. Please try again later.


Terry R. Nye
TOP 100 REVIEWERVINE VOICE
4.0 out of 5 starsFast memory card; no storage box for the adapter
January 10, 2018
Capacity: 64GBStyle: SingleVerified Purchase
I purchased this Micro SD card to use in an Amazon Fire HD 8 tablet. The card works in the tablet just fine, and apps run from the card just as fast as they did when in the tablet memory. This card comes with an adapter to use it in the SD slot of another device. My only criticism is this product does not come with a plastic storage box to keep the adapter from being damaged when not in use.
9 people found this helpful
Helpful
0Comment Report abuse
Comment

There was a problem loading comments right now. Please try again later.

    Showing 0 comments
    Sort by:
  • Newest
  • Oldest

There was a problem loading comments right now. Please try again later.


Matt M
4.0 out of 5 starsFakes or a bad batch?
September 27, 2019
Capacity: 16GBStyle: SingleVerified Purchase
I've had dozens of SanDisk cards for Raspberry Pis, dash cams, phones, and other things...never had a problem until now.

I ordered 4 of these in 16GB capacity (ship and sold by amazon) and opened 2 of them both packs didn't work right. On my Linux computer the reported 32GB in dmesg but 5.7GB capacity in fdisk and when I tried to 'dd' onto them it hung at 5.7GB.

Then I tried a Windows machine with the HP Disk Format tool which crapped out trying to partition the device just saying "volume too big" which I've never seen before

Even when it did write on Linux, the speeds were more like 5MB/s - nothing like a Class 10 UHS 1 card should perform.

Mine the font looks right and they even have unique serial numbers, although I see on the SD adapter what looks like a date code for 2018-04-20 (I got these on 2019-09-27). I also noticed opening them was extremely hard (compared to other SanDisk packaging) the backing you peal off just ripped at the pull-tab so I had to destroy the bubble plastic to get the card out...also contributing to my suspicions as to the authenticity. Usually the real SanDisk ones peal open quite easily.

Amazon's customer service agreed that it sounded wrong and recommended I return them.
2 people found this helpful
Helpful
0Comment Report abuse
Comment

There was a problem loading comments right now. Please try again later.

    Showing 0 comments
    Sort by:
  • Newest
  • Oldest

There was a problem loading comments right now. Please try again later.


CHT
4.0 out of 5 starsconsidered slow if formatted as internal storage for android
December 2, 2018
Capacity: 64GBStyle: SingleVerified Purchase
I prefer SanDisk SD cards as opposed to other brands as they are reliable and have high longevity, so I chose to buy this one (64GB Ultra microSDXC UHS-I Memory Card with Adapter). It works fine as an extra storage device. However, when formatting it with a brand new smartphone on Android 8.0, the system informed me that any apps/etc. run from this card would run slow if formatted to be used in this way. Long story short, I am not mounting this as internal storage but simply keeping it in the bay to move media on/off my phone. I guess this isn't a big deal to me, but it might be for you.

Another thing, usually when I buy these micro SDs with adapters, they come with a resealable little plastic blister pack that the adapter can be temporarily stored in after you first buy it. This one didn't come like that. The blister pack was not resealable, so make sure you have somewhere safe to store your adapter (preferably not just loose in a drawer somewhere).
2 people found this helpful
Helpful
11 comment Report abuse
Comment

There was a problem loading comments right now. Please try again later.

    Showing 0 comments
    Sort by:
  • Newest
  • Oldest

There was a problem loading comments right now. Please try again later.


awg0681
4.0 out of 5 starsSlow Card Message on DJI Drone
March 15, 2018
Capacity: 128GBStyle: SingleVerified Purchase
I bought this to use with my DJI Mavic Air, but I put it in the drone and got a message saying "Slow Card". The drone/software thinks the card isn't suitable for 4K video capture from the drone. I did one test flight with it and did record in 4K/24fps. The file looked fine when I played it back so I doubt there would've been any trouble recording to it. I also have a Samsung 128GB 100MB/s (U3) MicroSD EVO Select Memory Card with Adapter (MB-ME128GA/AM), which I also got from Amazon and is the same price as this. It does not give the "Slow Card" message when in the drone. I'll keep the card. The Samsung card was in a tablet so I'm swapping them out. I did notice that the when writing to the cards the Samsung averaged about 32 MB/s while this card hung around 24 MB/s. I didn't do any actual speed benchmarks, this was only transferring a few GB of pictures to both cards. Based on that I can't deny it's slower than the Samsung, but still probably would've been adequate for the video from the drone. It may also be some metadata label on the card identifying it to the drone as U1 whereas the Samsung is U3, but that is purely speculation on my part. However, for the same price, I'll be buying the Samsung in the future if I need more of these.
3 people found this helpful
Helpful
0Comment Report abuse
Comment

There was a problem loading comments right now. Please try again later.

    Showing 0 comments
    Sort by:
  • Newest
  • Oldest

There was a problem loading comments right now. Please try again later.


  • ←Previous page
  • Next page→

Questions? Get fast answers from reviewers

Ask
Please make sure that you are posting in the form of a question.
Please enter a question.
See all 1000+ answered questions

Customers also viewed these items

SanDisk 256GB MicroSDXC UHS-I Memory Card for Nintendo Switch - SDSQXAO-256G-GNCZN
SanDisk 256GB MicroSDXC UHS-I Memory Card for Nintendo Switch - SDSQXAO-256G-GNCZN
bySanDisk
$51.50
4.7 out of 5 stars1,169
SanDisk 400GB Extreme MicroSDXC UHS-I Memory Card with Adapter - C10, U3, V30, 4K, A2,...
SanDisk 400GB Extreme MicroSDXC UHS-I Memory Card with Adapter - C10, U3, V30, 4K, A2,...
bySanDisk
$82.78
4.6 out of 5 stars2,771
SanDisk 512GB Extreme MicroSDXC UHS-I Memory Card with Adapter - A2, U3, V30, 4K UHD,...
SanDisk 512GB Extreme MicroSDXC UHS-I Memory Card with Adapter - A2, U3, V30, 4K UHD,...
bySanDisk
$9.95-$406.42
4.6 out of 5 stars2,771
256GB EVO Select Memory Card and Sabrent SuperSpeed 2-Slot USB 3.0 Flash Memory Card...
256GB EVO Select Memory Card and Sabrent SuperSpeed 2-Slot USB 3.0 Flash Memory Card...
bySamsung
$40.97
4.6 out of 5 stars24,801
SanDisk Extreme 256GB microSD UHS-I Card with Adapter - 160MB/s with  SanDisk MobileMate...
SanDisk Extreme 256GB microSD UHS-I Card with Adapter - 160MB/s with SanDisk MobileMate...
bySanDisk
$62.97
4.6 out of 5 stars2,771

Need customer service? Click here
‹ See all details for SanDisk 256GB Ultra MicroSDXC UHS-I Memory Card with Adapter -...

There's a problem loading this menu right now.

Learn more about Amazon Prime.

Get fast, free delivery with Amazon Prime
Prime members enjoy FREE Two-Day Delivery and exclusive access to music, movies, TV shows, original audio series, and Kindle books.
> Get started
Back to top
Get to Know Us
  • Careers
  • Blog
  • About Amazon
  • Press Center
  • Investor Relations
  • Amazon Devices
  • Amazon Tours
Make Money with Us
  • Sell on Amazon
  • Sell Under Amazon Accelerator
  • Sell on Amazon Handmade
  • Sell Your Services on Amazon
  • Sell on Amazon Business
  • Sell Your Apps on Amazon
  • Become an Affiliate
  • Advertise Your Products
  • Self-Publish with Us
  • ›See More
Amazon Payment Products
  • Amazon Rewards Visa Signature Cards
  • Amazon.com Store Card
  • Amazon Business Card
  • Amazon.com Corporate Credit Line
  • Shop with Points
  • Credit Card Marketplace
  • Reload Your Balance
  • Amazon Currency Converter
Let Us Help You
  • Your Account
  • Your Orders
  • Shipping Rates & Policies
  • Amazon Prime
  • Returns & Replacements
  • Manage Your Content and Devices
  • Amazon Assistant
  • Help
    EnglishChoose a language for shopping.
    United StatesChoose a country/region for shopping.
      Amazon Music
      Stream millions
      of songs
      Amazon Advertising
      Find, attract, and
      engage customers
      Amazon Drive
      Cloud storage
      from Amazon
      6pm
      Score deals
      on fashion brands
      AbeBooks
      Books, art
      & collectibles
      ACX
      Audiobook Publishing
      Made Easy
      Alexa
      Actionable Analytics
      for the Web
       
      Sell on Amazon
      Start a Selling Account
      Amazon Business
      Everything For
      Your Business
      Amazon Fresh
      Groceries & More
      Right To Your Door
      AmazonGlobal
      Ship Orders
      Internationally
      Home Services
      Handpicked Pros
      Happiness Guarantee
      Amazon Ignite
      Sell your original
      Digital Educational
      Resources
      Amazon Rapids
      Fun stories for
      kids on the go
       
      Amazon Web Services
      Scalable Cloud
      Computing Services
      Audible
      Listen to Books & Original
      Audio Performances
      Book Depository
      Books With Free
      Delivery Worldwide
      Box Office Mojo
      Find Movie
      Box Office Data
      ComiXology
      Thousands of
      Digital Comics
      CreateSpace
      Indie Print Publishing
      Made Easy
      DPReview
      Digital
      Photography
       
      East Dane
      Designer Men's
      Fashion
      Fabric
      Sewing, Quilting
      & Knitting
      Goodreads
      Book reviews
      & recommendations
      IMDb
      Movies, TV
      & Celebrities
      IMDbPro
      Get Info Entertainment
      Professionals Need
      Kindle Direct Publishing
      Indie Digital Publishing
      Made Easy
      Prime Now
      FREE 2-hour Delivery
      on Everyday Items
       
      Amazon Photos
      Unlimited Photo Storage
      Free With Prime
      Prime Video Direct
      Video Distribution
      Made Easy
      Shopbop
      Designer
      Fashion Brands
      Amazon Warehouse
      Great Deals on
      Quality Used Products
      Whole Foods Market
      America’s Healthiest
      Grocery Store
      Woot!
      Deals and
      Shenanigans
      Zappos
      Shoes &
      Clothing
       
      Ring
      Smart Home
      Security Systems
      eero WiFi
      Stream 4K Video
      in Every Room
      Neighbors App
      Real-Time Crime
      & Safety Alerts
      Subscribe with Amazon
      Discover & try
      subscription services
      PillPack
      Pharmacy Simplified
      Amazon Renewed
      Like-new products
      you can trust
      Amazon Second Chance
      Pass it on, trade it in,
      give it a second life
      • Conditions of Use
      • Privacy Notice
      • Interest-Based Ads
      • © 1996-2019, Amazon.com, Inc. or its affiliates