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!

3,885 people found this helpful

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A and V

fake

Reviewed in the United States on August 13, 2018

this product is not what is advertised. it ended up being a 2gb card sold as 128GB be careful, do not buy.

1,388 people found this helpful

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Aftermath

I may have judged too quickly, "MAY HAVE"...

Reviewed in the United States on November 16, 2018

Capacity: 128GBVerified Purchase

Update: August 13, 2019, Tuesday

After a purchasing this same memory card from another buyer, it's been shown that some of those Micro SD cards have to be compatible on both the device being used to record, and the one used to replay/playback the recordings. To access the full span of the 128gb, some devices (like the security camera I purchased the Micro SD card for) can only read up to 32gigs of memory no matter how much memory is on the card. SO it is possible that I was using a device that can only read up to 32gigs at a time. I haven't repurchased this item from this supplier so as not to leave it up to chance, although I will update them from 1 stars to 3 stars simply due to my own lack of knowledge at the time. Perhaps their product did work as expected...Possibly.....

Original Post:
I purchased what I thought was this item on Friday November 2, 2018 and thought it was a great deal because it was cheap. I read other reviews about even cheaper ones selling for $7-$12 that said those were a scam and not the actual product. So I thought that since this one was priced at $22.25 at the time, that this one was legit. THIS MEMORY CARD IS NOT THE 128GB MICRO SD CARD as advertised. To make sure I was not falling victim to the scams the other reviews talked about, I tried to transfer something well over 32gigs (40+ GIGS) just to be sure. It told me I needed 14.4 more gigs to copy it. That's strange......seeing as how this is advertised as a 128gb Micro Sd Memory Card. AGAIN, THIS IS NOT THE 128GB MICRO SD MEMORY CARD AS ADVERTISED!!! DO NOT BUY THIS IF YOU THINK YOU'RE GETTING A GOOD BARGAIN. THAT'S NOT THIS PRODUCT!!!!

14 people found this helpful

Helpful

Noodler's Pen

The first one started getting errors after about 6 months of use and then went bad within a year

Reviewed in the United States on July 11, 2018

Capacity: 200GBVerified Purchase

This is actually the second of three of these cards that I own. The first one started getting errors after about 6 months of use and then went bad within a year. Sandisk has a rather convoluted return process. I do give them credit for standing by their warranty service...their warranty is great. While this was bad I bought a second one and I'm using that. After 2 months, I am already getting errors. The product handles video and audio fine. The reason for only 3-stars. I'd rather have a micro-SD card that is reliable. Losing data is not fun. Having one card go bad and now a second card starting to fail, indicates a quality problem.
Update April 2019
So I bought this in July of 2018 and now for the last couple of months I've been getting occasional errors on this. Based on previous experience I am trying to back this up on a regular basis. I am not using the full amount of storage. Formatted capacity now shows as 183 GB and I am only using about 44GB. I am guessing that within a couple of months this one is going to fail as well.

21 people found this helpful

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Kevin Jones

Misleading Size

Reviewed in the United States on March 11, 2019

Capacity: 400GBVerified Purchase

400 GB is really 367 GB. While, technically, the card does contain 400 gigabytes of storage (as in 400 billion bytes), this is misleading since operating systems have never reported the actual number of bytes this way. Rather, they use the binary system where one GB is 1024 to the third power or 1,073,741,824 bytes. Mount this card on any operating system and the amount of storage is shown as 367 MB. This is what we are all used to since computing devices were invented and these cards are used in these computing devices that report their capacity in the binary form. So why continue the deception? More sales equals more money. Or, put another way, one company started doing it and now they all do it and no one company will do it correctly for fear that they will lose their competitiveness.

When I read the manual for my device and it says "Maximum capacity allowed on the SD card is x GB." then I trust that I need to get an SD card that is X GB if I want to fully utilize that feature. I don't want have to try to figure out that, to get X GB, I have to look for a card that has X * 1.??? GB. In fact, you can't even get a card that has X * 1.??? GB because the manufacturers make cards with capacities like 64, 128, 200, 256, 400, etc. So, essentially, we're getting screwed out of some percentage of storage because the card manufacturers want to play a different game than the entire rest of the industry.

9 people found this helpful

Helpful

Dado21

Read/Write speeds low with H2testw

Reviewed in the United States on July 10, 2018

Capacity: 128GBVerified Purchase

I ran H2testw to verify storage space. It read 121GB but the transfers speed were not even close to the up to 100mb/s. The write speed was 18.3mb/s and read was 28.3mb/s. I am glad it at least was almost full storage but disappointed on the read/write speeds. For this price I am going to keep it but not as advertised on speeds.

15 people found this helpful

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Devin Warner

Came as Expected... Mostly

Reviewed in the United States on November 28, 2018

Capacity: 400GBVerified Purchase

I've heard horror stories of faulty/fake/wrong SD's being delivered instead of the real deal, and I'm pleased to say I had no such issues. It's a SanDisk SD, and for the most part it's everything I expect. However, unfortunately, it's packing only ~366 GB of space, which is, IMO, lower than it should be considering it's a 400 GB card. I know it's almost always a tad bit lower than advertised, but 34 GB seems like a lot of lost space. As such, I'm shaving off a couple stars.

I purchased the SD card for my Nintendo Switch, which of course was an insanely easy installation process (I had no photos or videos to transfer over so it made things even simpler). Better yet, I got this during a holiday deal for like ~$150 off, so all in all it's not like I lost much from the missing 34GB. That being said, there's no way I'd buy this full price moving forward and I'll continue to wait for sales on items like these to compensate for the lost space.

10 people found this helpful

Helpful

Kay

Decent SD Card, but have had both fail already ~ 2YRS . Easier to buy a new one.

Reviewed in the United States on January 19, 2020

Capacity: 64GBVerified Purchase

Summation: Card was affordable and I liked the additional storage on my phone. However, both both cards have failed after 2 years of 'normal' use. It is probably easier to just buy a new SD card and move on.

====

I purchased two of these SD cards in 08-2018 to expand the storage in two Moto G6 phones. One card was more "heavily" utilized as I moved what apps I could (Facebook, Fitbit, Instagram) to SD storage, as well as music from Amazon. The other SD card was not used as much and was just there in case more storage was needed.

I had issues with my phone that drove me to reset the phone and reformat the SD card several times. After the last reload, I was advised not use the SD card and that was determined to be the problem.

I completed an RMA on the card. Honestly, it would have been easier to buy a new SD card rather than go through the RMA process. SanDisk support verifies the card is dead with you. Then you mail it back to them and they send you a new one a few weeks later. I appreciate the warranty support of course.

Overall, it is a good product. You should just expect to buy a replacement or upgrade within a few years apparently.

2 people found this helpful

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Incognito

Died after only 6 months use!! Over 100GB of music, documents, videos and images in limbo . . .

Reviewed in the United States on September 3, 2020

Capacity: 200GBVerified Purchase

Died after only 6 months use!! Over 100GB of music, documents, videos and images in limbo . . . Oh so very freaking nice . . . One day all my phone's apps stopped recognizing it. It just quit functioning. My PC didn't see it when I hooked it up my phone via USB. It was invisible! Fortunately I was able to retrieve files from it after actually pulling the dead card out and plugging it into a device to read microsd cards directly via USB and I tediously backed up everything to my computer.

I have contacted SanDisk directly for them to honor the 10-year warranty. Their return policy is extremely time consuming requiring images of both sides of card and proof of purchase. I have wiped data and reformatted it before sending it back for a new card. We'll see how their replacement process goes...

I will update this review on SanDisk's behavior for replacement of their faulty products later on. Buyer beware and do backup your data stored on their memory cards frequently. Thankfully, I did so, which made data recovery a quicker process.

Update 9/24/20: I updated my review to 3 stars as SanDisk finally delivered a new 200GB card yesterday. The entire laborious process took from September 2nd 2020 to September 23rd 2020 to get another card. 21 days . . . well this new card is working for now. Time will tell . . .

One person found this helpful

Helpful

Jeffrey

Tip to make it faster when it is slow

Reviewed in the United States on September 21, 2019

Capacity: 32GBVerified Purchase

In my Dell PC I was getting a slow transfer speed with SD cards. It was reading at 10MB/s to 18 MB/s. But the card is advertised at 98MB/s. This is with an SD Card Reader built into the Dell PC. I tried the following steps:

1. Disabled Antivirus - Still 10MB/s to 18MB/s
2. Dell Website - Updated Realtek Card Reader Driver for my Model: Still 10MB/s to 18MB/s
3. Device Manager > Disk Drives > SDHC Card > Policies > Better Performance: 12MB/s to 18MB/s
4. Realtek website - Updated Card Reader Driver: 25MB/s to 28MB/s

So the answer was to download and update the Realtek Card Reader driver directly from Realtek's website. This increased the average speed a lot but it is still slower than it should be. The next thing to try is to buy a USB SD card reader and try it in a high speed USB port and see if the read speeds are faster.

Oh, by the way, step 3 above is potentially dangerous. Instead of leaving it on "Better Performance" you probably want to keep it at "Quick Removal" otherwise you might lose data. I think any speed increase with "Better Performance" could possibly be fake anyway because Windows might say that it is done transferring but it could still be transferring data in the background.

2 people found this helpful

Helpful

Gadget

Don't use in Security Cameras !!

Reviewed in the United States on February 14, 2019

Capacity: 128GBVerified Purchase

I have always loved Sandisk products. I choose to populate my 9 security cameras with the 128GB Ultra Micro SD cards. Well I made a mistake. Six of the nine Micro SD cards failed last week. Weird !! Well, it turns out that Sandisk does not warranty this retail card in security cameras. I purchased from Amazon I read everything included in the product description and I don't remember seeing not to use in security cameras. Sure enough it does say that on the warranty page on their website now. Anyway the cards are 8 months old and are bricked due to a limited number of writes.

Hope this helps some in the future.

Gadget

4 people found this helpful

Helpful

Lance B. Ramsay

Not quite as advertised

Reviewed in the United States on October 12, 2020

Capacity: 16GBVerified Purchase

I picked this up to deploy in a Raspberry Pi Zero with Pi-Hole installed. Since there are quite a few "fake" SD cards on Amazon, I wanted to test it out. The results are not super promising with a read speed of 52 MB/s and a write speed of 35 MB/s. Advertising speeds up to 98 MB/s seems misleading. While I believe this card will serve it's purpose, I would not trust this in something that needs faster read speeds.

2 people found this helpful

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