My iPod touch 5 has recently been unable to sync with iTunes whether it be over WiFi or through USB. It comes up with a message saying that the computer isn't authorized so I put in my credentials again and it says that it was already authorized but it still won't work. I've tried deauthorizing and reauthorizing the computer, restarting my iPod and iTunes and it still doesn't want to work. It is currently on 8.1.3 with 16GB memory.
iPod touch, iOS 8.1.3
Take a look at these support articles:
Authorize your computer in iTunes - Apple Support
If iTunes repeatedly prompts you to authorize your computer - Apple Support
None of those have helped me, The problem is that it won't sync with purchases made from itunes on the computer because if I deselect the purchase folder when in my ipod's music folder to sync the problem is solved but I then would have to manually add all the songs in the purchased folder
maybe this will help
iTunes Store: Associating a device or computer to your Apple ID
iPod 5 won't sync with itunes
