PA900 - USB Help Needed ...

[tony mads usa]

I purchased a 32GB SanDisk USB 3.0 drive and formatted it on the KORG Pa900. I then copied all the files from the thumb drive I have been using into a folder on my PC, then copied the contents of the folder on to the new flash drive.
If I try to access an MP3 or midi file from the USB by selecting it from the Songbook or from a 'Custom' songlist, I get a message saying "Resource not found". BUT, if I press 'Song Play' then press either Player 1 or 2, search for the MP3 or midi file on the USB and select it, it loads into the player and plays fine.
Anyone know what I might be doing (have done) wrong, or what the problem might be?
PS: There are no problems using the current USB drive, I would just like to have the convenience of leaving the smaller USB in the KB.
Thanks in advance ...

[tony mads usa]

Problem resolved ... USB had to have the same name as the thumb drive ...