The thumb drive is a little storage device about the size of you thumb. It plugs into the USB port on the PSR3000 (or any computer), and is recognized as a drive. Loading to and from is almost instantanious (I bet that's spelled wrong).
You can carry it on a chain around your neck if you want, and never be without all your own styles and songs.
I think I'll be a brain surgeon when I grow up, like Jethro Boudean.
DonM