Uncle Dave,
One has to wonder what Yamaha is thinking in the way they implemented the Audio styles. If you have to use a thumb drive for storage and you wish to create playlists to store on the thumb drive you can't use the audio styles because they can't be copied to a device external to the keyboard. I have not messed with the songbook or registrations yet but I am not comfortable not being able to save setups of any kind on an external device if for no other reason but to have a reliable backup.

Deane