Right, so I've made a majorly idiotic mistake and manually deleted some time machine backups from the Backups.backupsdb folder on my external HD. Now I can't empty the trash ("The operation cant be completed because an unexpected error occurred (error code -8003)"), and the backups are still taking up God knows how much space on my external HD. I've spent hours on Google, browsing forums (Macrumours too!) and trying every terminal sudo command I've come across. Can anyone help me? //Edit Re-formatting my external HD would have to be an absolute last resort, as I have gigs of stuff on there that I'd have to find somewhere to back up to first (and my MBP HD doesn't have enough space to store it all in the meantime).