For the most part I had most of my music on CDs, so I've imported all the songs I want onto iTunes. However, some songs I have are just on my computer itself...so I've figured out that you do File, Add file to library. Now does that make a copy of it in iTunes, so you have it in 2 places then? Or does it just play from the location on the computer. Because I thought I could just add all the songs to iTunes, then delete them outta the files on my Desktop. But when I did that, iTunes said it could not find the song, or something like that? So do you have to keep the files all in a folder still somewhere on your computer?