Hello, I'm having a bit of trouble getting disk utility to set up my 2TB external HD the way I want. I would like to have one 500gb partition to use for time machine to back up my macbook pro, and have a 1.5 TB partition to store my video files. It seems to only let me divide the disk into two equal parts, or have 1 partition with 1TB and one with less than that. I can't get it to divide unequally. Is this possible? Thank you!