I currently have all my music on my NAS and my itunes can find the server no problem. In order to allow playlist creation and sycing, I have added the server directory to library without creating a local copy (manual organization). The problem I'm having now is what to do when I add new music. Do I just choose "Add to library..." and rescan the entire drive again? I started this but canceled because it seemed like it was going through every file again. I wasn't sure if it was creating duplicates or just scanning.