I had to restore my iPod, and all the music was deleted.
It's still on iTunes but it says I have to restore it again everytime I try to sync it, and so I can't add the music to my ipod.. and I don't know what to do.
iPod touch (4th generation)
Maybe:
Restore loop (being prompted to restore again after a restore successfully completes)
Troubleshoot your USB connection. If the issue persists, out-of-date or incorrectly configured third-party security software may be causing this issue. Please follow Troubleshooting security software issues. .
Next try placing in DFU mode and then restoring.
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
Last, try restoring on another computer.