Hi all. I'm trying to use Bootcamp, but it's not working. Here's the error message: "The disk cannot be partitioned because some files cannot be moved. Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using Boot Camp Assistant again." However, I already have it set up as a single Mac OS Extended (Journaled) volume! I also can't exactly back everything up and wipe it clean b/c my external HD is a lot older than my computer and can't hold all my files. So, any advice?