Probably, the two sandisks were in a Motorla RAZR before this... hehe, oops... I think I'll reformat them now >.>
when formatting, is it best to use fat32 or fat16?
Per my post @ m3-forums:
"fat32 starts gba games quicker using A instead of start....that's the only advantage I see so far but I only play games and don't watch videos.
Fat16 with 64k cluster size is the best format from what I've experienced and it seems to be the consensus for DS games. With a regular sandisk microsd (2 gig) I get a perfect 5 (looks exactly like it is on g6 and supercard) on the castlevania test with the new firmwares v27+. But like I said gba games you have to hit start to start the game instead of A and wait a bit while it loads."