I currently have a 500GB external hard drive which is split into two partitions of equal size, one for Time Machine and another for video. I recently bought a new 1TB drive that I'd like to use for my video files, giving the full 500GB drive to Time Machine. My question is, how do I do this without losing data? If I move the video to the new drive, is it possible to delete that partition on the old one and "open up" the space without reformatting (and losing my backups)? Or can I temporarily move everything to the new drive, reformat the old one, then replace Time Machine? I feel like this is that old riddle about the three animals needing to cross the river without killing one another!