I tried syncing my ipod classic but it says 'no disk' [Closed]

Registration date
Wednesday February 3, 2016
Last seen
February 3, 2016
A couple days ago I tried to sync my ipod classic because I added a few new songs and all of a sudden my ipod couldn't be found. I tried restoring it through itunes, changing wires, turning on disk mode, etc etc and finally I found a solution here and now it's being recognized, BUT it won't freakin sync! it synced a couple songs but when I try to sync the rest it keeps say that there's no disk found.... Apple service is doing nothing about this and even refuse to run a diagnostic on it so I don't know