I've been trying to update my 2nd gen ipod touch with the new os system but I need to back everything up first. So I decided to do this before I went to bed since I knew it would probably take a while. When I got up after letting it back up for over 10 hours it only had one bar of progress. x__x If I decide NOT to back everything up and just continue with the update will all my apps, music, pictures, ect. still be there...?