Amazon.com: Customer reviews: SanDisk 256GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card

Top positive review

Believe the "Fake Card" Hype - Photo to Prove It

Reviewed in the United States on 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!

2,718 people found this helpful

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Barbara A Botts

Defective card

Reviewed in the United States on 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!

1,757 people found this helpful

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Jeffrey Fahndrich

Believe the "Fake Card" Hype - Photo to Prove It

Reviewed in the United States on September 30, 2018

Capacity: 200GBVerified Purchase

2,718 people found this helpful

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2525 comments

Markus

The card was tested with H2testw and as you can ...

Reviewed in the United States on November 25, 2017

Capacity: 200GBVerified 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.

159 people found this helpful

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11 comment

Morgan Fleur De Lys

Placed in Nintendo Switch, Got 363 GB of Usable Space

Reviewed in the United States on December 3, 2018

Capacity: 400GBVerified 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.

14 people found this helpful

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33 comments

Amazonn Costumerr

Consider what you are gonna use this card for before buying

Reviewed in the United States on January 24, 2019

Capacity: 128GBVerified 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!!

10 people found this helpful

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Twiddles42Top Contributor: Doctor Who

Works in Galaxy Note9 (but sees the card as 366GB when formatted)

Reviewed in the United States on August 27, 2018

Capacity: 400GBVerified 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.

8 people found this helpful

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11 comment

Great value in terms of storage per dollar, but SLOOOOOW. Conditionally recommended.

Reviewed in the United States on April 20, 2019

Capacity: 200GBVerified 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.

4 people found this helpful

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Matt M

Fakes or a bad batch?

Reviewed in the United States on September 27, 2019

Capacity: 16GBVerified 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.

3 people found this helpful

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0Comment

Fast memory card; no storage box for the adapter

Reviewed in the United States on January 10, 2018

Capacity: 64GBVerified 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

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CHT

considered slow if formatted as internal storage for android

Reviewed in the United States on December 2, 2018

Capacity: 64GBVerified 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

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11 comment

awg0681

Slow Card Message on DJI Drone

Reviewed in the United States on March 15, 2018

Capacity: 128GBVerified 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

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