I have an IPOD classic (both a thin and a thick). Neither will restore from iTunes. The thin one is stuck on a single screen. The thick one will play and move normally. iTunes recognizes it, but always asks to restore, but it will not complete the process. All of my songs are still on it and still play well. Suggestions?

Ipod classic won’t connect to itunes . States it is corrupt. I try to restore and it tells me it can’t restore because it is busy or unknown error.