Can somebody help me please? I am currently trying to delete a load of stuff off an external hard drive. I have a folder full of music (laid out like an iTunes Music folder, all the artist folders) on the external, and I only want to delete the music that I already have on my computer. Is there a way to select just those folders that I already have, or will I have to do the tedious job of going through each folder? It's like, 50GB worth of music here. Cheers!