Hi, Pete,
I have tried a Sansa Clip+, another cheap player from Azamon, and a 2 different flash drives.
When connected to the USB port, they all mis-played the same.
However, both MP3 players will play tracks and discs properly thru headphones.
The SYNC4 would start playing without any command, and all devices would begin playing the same
audio book, even tho it is way down on the list.
I'm sure that the main problem resides with the ID tags. I do not know how to manage those.
When I attempted to move books from my PC to itunes, the 5 disc book only transferred the first 3 discs..
Maybe I can rip the CD's to itunes, then copy to my iphone........