I have searched the forum but can't find the answers to the following questions: 1) Are the backup files used by iTunes compressed ? I have downloaded 6Gigs of movies, and 1.5 G of music, Books and other files, but the backup folder is less than 400MB. 2) My iPad2 has the following: Capacity 29 G (the unit is a 32G unit) Available 16.3G (Which means that I have 12.7G of stuff, Does the Operatings System use 3G ?). Where are these files kept on my PC ? Thanks.