Elliott Bck
I got a card and it wouldn't let me copy files to it, it would (a) not recognize on any of the three computers or my android tab at home, and (b) unmount itself in the middle of file copies.  These two things happened randomly.  I got a replacement, but it suffered from the problem of letting me format it (yay, farther than I got with unit 1), then crapping out 300mb into a file transfer.AVOID THIS GUY.