I've successfully been running my iTunes library off of an external hard drive for some time now. I have copy files to the library and keep library organized both checked and haven't had any problems... until just now. The folder of music on my hard drive has vanished. It's not in my trash which I hadn't and haven't emptied today. It's not on the drive and spotlight searches for individual tracks or artists come up completely blank. My "library" file is still intact and iTunes has maintained a log of everything I previously had. A lot of this was very hard to find material. Hours and hours have gone into that collection. Can anyone help me out here at all?! Thanks so much in advance to anyone who can. Edit: the small collection of videos I had in my library is still there. All the music is gone and my external HD magically has a bunch of new free space.