Title. I have memory clean, and it says I have 12 gb to clean, but when I clean it, nothing happens. Is there anyway for me to check if I have any useless files on my computer that I don't need? Specifically cache type files, files that are more hidden. My applications are clean. I just don't know why I have such little gb left. Also is there a way to delete songs in iTunes without having the "!" come up? I had an option ticked to allow iTunes to organize the music library but I realized this duplicated a lot of tracks. What is the easiest way to go about deleting the duplicated tracks, but not having the "!" come up? I currently have my music organized in my own library so I don't need the iTunes music library, but the majority of my songs in iTunes is rooted to the iTunes music library and not my own. Thanks.