I am using a 16 gb thumb drive in my USB port on my Prius III. Presently, I have a LOT of folders, which makes scanning through my music extremely arduous. I would like to create playlists on the thumb drive, but I don't know what playlist format would work. I'm familiar enough with Winamp to create playlists in there, but will they work on the audio system? And the reason I'm using this USB is because my iPod classic has issues. It works for about 1.5 songs before locking up.