when i bought my new mac, i transferred all my music to itunes, some by dropping it right into the library, and some by going into the "Find folder" option. i didn't realize at the time that when i dropped it in, it was automatically making copies of the music in the itunes folder, so i also kept the original folders. now i can't remember which ones have are in the special itunes folder, and which are just in the music folder. i want to delete the duplicates since it could be more than 5G, is there an easy way to find out which ones are saved twice?