erase and sync issue

so i want to sync my ipod with a new computer. when i plug it in iTunes of course gives me the "erase and sync" option. Now i don't care about starting with a fresh iTunes library and erasing all of the exiting music/movies on the iPod -- however...

i've been using the iPod as an external drive to backup all my documents/files... what i need to know is: if i choose the "erase and sync" option, will itunes erase the entire drive, or just the music etc. i don't mind if it wipes out all the music, but i need to be sure that it's not going to touch all the other files.

thanks for the advice/help


f.