droidcomplex
Newbie
Watch out for Counterfit cards...you can google and find out ways to test on your phone to see if the card meets the specs. SD Tools in the Play Store is one way to check.
They look exactly like the real thing but may not be but an 8 gb card when sold for a 32 and they will rewrite over your data and also the write speeds to the card and read speeds may not be legit.
Go on Amazon and read the reviews and make sure to buy from a legit seller.
SD tools doesn't work on S3 yet. I used H2testw on my workstation to verify my SD card as the work around.