Every time I try to move the Aperture Library container (the one located in the user/images directory) it copies about 6GB (of a total 302GB) and then stops, saying something like "some of the files in Aperture Library could not be read or written." I've tried three times now with no success. I really, really, really need to move these files off my computer, I've got only 4GB of space left out of my internal 500GB. I was planning on going through the library today and organizing some vaults in hopes of speeding up the program's overall performance (it's being ridiculously sluggish even though I've got a 24" 3.06GHz Core2 Duo iMac with 4GB of RAM) Any help is greatly appreciated. This just seems like it should be simple.