Something dawned on me today. I have a 512 MB USB key. When I open it in Finder, as normal it tells me how much available space there is. It is recently formatted, and I had about 25 MB of files on there, but only 400 MB or so of space. Then I remembered that all drives have a ".trashes" hidden file or something like that - hinting that perhaps some of the space was taken up by trash. Upon deleting the Trash, the space returned - but of course, I emptied all of the other items in the Trash, including those originating from the hard drive. So the questions: 1. Can I permanently delete things from the removable drive without them going in the Trash? 2. What happens when I move the USB key to another computer - do the key's Trash items move to the Trash of the other computer (I know I could test that out to see) 3. Is there a way to empty the Trash of one drive without emptying the entire Trash, except for selecting individual files (whose origins are not immediately clear anyway, and this would be very tedious)?