Hello,
I've encountered a big problem while updating the iPhone 4.

I've backup all the data on the computer, after updating it to iOS 4.2.1 and choosing to restore from the backup I just made, the machine sync up very quickly(which is weird because there's 8GB of data).

I've figured out how to reimport contacts from the SIM, but the Apps thats on it are gone(most likely part of the backup that refuse to sync up), and I have no luck trying to retrieve them Apps Store purchase history(Apparently its not like STEAM). some of the files are mp3 and videos, and from my research, they will have to be re-synced back to the phone.

The data(8GB) is there, and iTunes just can't get it into the phone, is there anyway I can view the iPhone 4 as USB drive(I'm thinking of manually transfer the data onto the phone) or perhaps another way of doing this?