So I have a ton of music on my computer. Multiples of songs etc. I've deleted a lot of songs off itunes but still have other copies of them on my computer. I once tried to delete the files but then when I played them on itunes they wouldnt work. So I'm curious, how can I make a copy/file of all the songs on my itunes as backup and delete everything else. And do it safety. I dont wanna have to do everything one by one.