Whenever I delete files off my external hard drive (or any usb drive for that matter) it doesn't really delete them, I can see the files still there in the hidden files view and the space is still taken up. It feels like deleting files off of a CD-RW, if I want my space back, I have to reformat the whole thing, which when you have 300 gigs, isn't something you really want to do just to get back a gig of space... I have heard of emptying the trash but this doesn't really seem to work... Any truth to this?