First and foremost, the USB should be formatted in FAT--not FAT32. Next, the USB must be one that does not have it's own built-in operating system. Larger USBs, particularly those of multiple gigabytes, have been a problem.

Good Luck,

Gary
_________________________
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.)