PEN15
I use this card in my Samsung Galaxy S3 and have not had any issues with it at all. I have had other brand memory cards which have failed and become unreadable in the past, this however has accepted anything I throw at it. I use it to store all pictures that I take on the phone (currently 1,700+), music and videos. I have mp3's and a few movies on it and there is never any lag or random un-mounts. I highly recommend it.