I believe Tim is right about this. There should be something in the instruction manual about the card type, but with the manuals it's often difficult to find the information you need. When I first got the PSR-3000 it would not read the USB drives larger than 2-gigs. An OS update changed all that and now I read 8-gig USB drives with ease.

Good Luck,

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)