ADATA 64GB Premier microSDXC UHS-I / Class 10 Memory Card with SD Adapter, Speed Up to 50MB/s (AUSDX64GUICL10-RA1)

Pros: Purchased these when offered as a 2 pack. Both came already formatted to Ex-fat. When installed in my Galaxy S3 the card was recognized immediately. I take tons of pictures and videos with my phone on a daily basis and have had no issues at all with this particular card! I also installed the second card into my Transformer TF300T which recognized it right away. Loaded it up with some videos and have had no problems playing any type of media with my tablet. Also use it on a weekly basis for running data backups with my tablet! These worked great for me, and I have had no issues at all. I highly recommend these if you need a reliable flash card for any of your devices! I would purchase this brand again when I need more down the road!

Cons: None at all!

Pros: I tested my new card right out of the package with its factory exFAT format. Class 10 interface: Test finished without errors. Writing speed: 17.9 MByte/s. Reading speed: 25.9 MByte/s. The device is suitable for a ReadyBoost cache. The random read speed is 3164 KB/sec. The random write speed is 22928 KB/sec. UHS-1/USB 3.0 interface: Test finished without errors. Writing speed: 19.0 MByte/s. Reading speed: 36.6 MByte/s. The device is suitable for a ReadyBoost cache. The random read speed is 4012 KB/sec. The random write speed is 31997 KB/sec. Solid performance. This is a fine card. Jim

Cons: None

Pros: Cheap and good performance when it worked.

Cons: Did not last very long.

Overall Review: Installed into my phone and after 5 months, and 25Gb of storage, can no longer be written to. While the data can be copied out, the SD card itself cannot be used to store new files nor can it be deleted or formatted. Total disappointment and waste of money!

Pros: High speed, bought on offer.

Cons: Bought two on 7/22/2015. One is already dead as of 9/15/2015. Only light use in a smartphone, some apps and a few photos. memory only got to about 3.6 GB used space and then died. Next time I guess I'll go for a different brand.

Overall Review: Perhaps is just bad luck, I have used microSD cards for several years and this is the first that dies on me.

Pros: It was inexpensive.

Cons: This is the only SD card that failed on me. I am skeptical at this point, it failed with minimal use.

Pros: Price for capacity and "speed" is a very good ratio, but....

Cons: The read speed is below par as well as the write speed and transfer speed. I've been using this with my GoPro 3+ Black, and it worked for a while (about 2 months) before it started to cause the camera to freeze. Found out from GoPro that it's because the write speed isn't fast enough even though they recommend 45mpbs write speed as this is advertised at about 50mpbs. Also when viewing videos directly from the card, it will lag, skip, tear etc. Then when transferring data (so I could actually watch my videos), the speeds were quite sluggish as well.

Overall Review: I'm sure this card works fine for a smartphone or something less demanding of write speeds. So, I would STRONGLY recommend against getting this for any type of HD camera. Spend the extra dough for a higher quality card i.e. Sandisk or Lexar.

Pros: cheap

Cons: CHEAP THIS FAILED IN LESS THAT 6 MONTHS DO NOT BUY

Pros: The price was fairly cheap when it was on sale. Should have known I was going to get what I pay for.

Cons: Purchased this card late April, had it for less than two months in my Note 3 without any issues. And then one day I get a notification that my SD card needs a format, not allowing my to access any of my files. ALL my personal photos and videos were on that card and now it's all lost. I can't even format it to use again due to some unknown error. Would definitely shy away from this piece of cr ap of a card.