I am downloading the 2.2 software update, but it has been stuck on this like 15 minutes: Backing up "Peppy's iPod"... and its only like half way thru... Any one know why its taking so long? Do I NEED to back up my ipod? P.s. my computer recently has been getting this message "Your startup disk is almost full", when I try to update my ipod (adding apps, updating, syncing). Do you think backing up my ipod is causing this?