I think that whenever I added a song to my iTunes library, iTunes was copying the file to the iTunes music folder which appears to be located on my primary HD. This is a problem since this seems to be duplicating my music files. I had set up my iTunes to use a music folder on a large external HD because my primary HD is very limited. I have now unchecked the box that is located in the advance box under iTunes Preferences. This is the box that is next to "copy files to iTunes music folder when adding to Library." Now I would like to delete all the music files that were duplicated when I was adding to my iTunes library and had the box checked. I am scared to delete the folder I think is the right one. How can I be sure I am deleting the right folder? I think it's a folder in ~/music/iTunes but I'm not sure. Can anyone re-assure me on this?