Problem with the sync iPhone with iTunes

Question

I have a upgrade my iPhone 3G from 3.1.2 to iOS 4.1 and itunes to 10 and from that moment when I sync my iphone starts with the backup of the iPhone, then sync contacts, calendar etc. .... when the step 4-5 of 6 tracks from iTunes or sync gives me this error "can not synchronize iphone.impossibile find the required disk" but instead is connected because if I go to iTunes> Devices> iPhone finds me and makes me get into the application settings, music, photos etc. .... thing may be? reading around some say is itunes .... how do I fix this??I apologize if I misspelled but I'm Italian)

Answer 1

Do you mean that you get an error during the backup step during the sync? Temporarily, you can click on the "x" next to the backup message to skip the backup, but you will want to figure out why the backup is failing before you lose valuable data.
The most common cause of a failure during the backup step is a corrupt backup from a previous sync. This can happen if a sync is interrupted, and occasionnally for no apparent reason. If this is the problem the solution is to delete the backup in iTunes Preferences, on the Devices tab. If this does not resolve your problem please let us know what kind of computer and operating system you have.