I am using a jailbroken ipod touch 3g 32gb mc model with 3.1.3 firmware. Now I just sync apps with itunes as the music and video in my ipod would take a lot of space in my hdd. So if i restore, I will lose all my music and videos.What should I do? I want to update to 4.0 and jailbreak it. Should I update or restore? If I restore, I have to manually sync all the music and videos now. Or should I just upgrade and jailbreak?