I have a 500gb WD MyBook external hard drive... I only have about 150 gigs on it, but it tells me that there are only 113 gigs left, which I have figured out is because it does not seem to actually free up space when I delete files from it. So, essentially, every time I add a file, the space that that file fills is filled permanently, even if I later delete the file. The only solution I've been able to find from browsing forums and googling is to partition my hard drive as Mac OS X Journaled (extended), but it is already partition thus. I don't have the space on my internal hard drive to move everything onto it while I completely reformat the external.... Any ideas?