So I just got an iPod off of ebay. Good customer reviews, 160GB 7th Gen iPod. I have 4325 songs in my iTunes library, all of them previously on my old iPod. Here's what I did: I deleted all the songs from my iTunes library. I copied all the files off my old iPod and added them to my iTunes library, with a copy of each song being created for my iTunes library file. Now, I'm trying to sync my new iPod to my library. It works...for half of the 4000+ songs! The other songs arent synced. So I tried moving them manually. It only works until I get to a particular group of songs, then the (-50) error message pops up. How do I fix this?