My collection of iTunes music and movies has outgrown my internal hardrive. So I uncheck Copy Files to iTunes Media Folder when adding to library. What does not make sense to me however is the check box above. "keep itunes media folder organized". This really confuses me because if I am not moving the files into the media libary why would it want to rearrange the files? So does that mean for example that on my external hardrive its going to move the original source files? Thanks much!