itunes wont be able to do that, since it allows syncing just one way (pc to ipod). you need a 3rd party software to transfer from ipod to pc. i use imtoo ipod computer transfer, works real well. and i was able to salvage my ipod contents when my computer crashed! real lifesaver highly recommended.
hope this helps! goodluck.
17/06/2013 5:11 am
You can use AVCWare iPod/iphone to iPod/Computer/iTunes Transfer.
With it you can:
1: Transfer iPod files to Computer
2: Transfer iPod files to new iPod
3: Transfer iPod files to iTunes
4：Transfer local files to iPod without iTunes
5: Manage your iPod like a movable hard drive and transfer ipod videos/photos/music between iPod and iPod, iPod and computer/laptop, ipod and itunes.