I remember when first working with the USB connections I was getting some pretty flakey results using lossless files (.WAV, etc) on the thumb drive, especially after more than about 25 songs were present. Once everything loaded to the flash drive was in an MP3 format all those problems disappeared and everything worked great.
Here are the steps to access the drive in the center console (assuming it's plugged in):
- Main Menu - select "CD/Multimedia"
- Next select "External devices"
- Finally select "UDISK" and the music should begin playing and you can see what's on the drive to make selections.
Hope this helps.
Best regards,
Ed