Amazon Customer
When I first got this card, it worked perfectly in my Galaxy S3 phone.  Then, I rooted the phone and installed the Cyanogen Mod ROM to gain additional features not available from my carrier.  The card was instantly corrupted by that ROM, because it's formatted with a filing system the ROM doesn't support.  Fortunately there was nothing on the card I couldn't replace.I ended up having to use a third-party utility to format the card with a filing system supported by both Windows and the ROM.Once properly formatted, there have been no corruption or data loss issues and the card has performed well.If you are using a stock Galaxy S3 ROM, you'll have no problem at all.  You'll find the card roomy and fast.