So I'm trying to figure out the best way to backup my music to my external hard drive while still keeping some music on my computer. Basically what I'm trying to do is move all my music to my external hard drive and then delete some of the music from my computer except things that I always listen to. But my problem is, when I go to backup my music in the future, most of it is all on the external except for the new stuff I have downloaded. So what would be the best way to be able to keep backing up my software with only the new stuff I have downloaded. Does this make any sense?