Cat Cat
I cannot say if it's the SD card or the phone, but google sez it's the phone. Put your MP3s on this card for your Galaxy S3, and the result is a jumble of corrupted files. Yep, that's what I got. So, in fairness to SanDisk, I gave this card 4 stars, and a suggestion to y'all out there, get the 16gb card for your S3 instead.