I've got a MBP which I mainly use for video editing and as such I want to keep as much free memory as possible on. I have an iTunes collection of about 30GB on my old macbook which I would like to move over. I can pick up a 64gb flash drive for about £30. The idea is that I can keep the drive in my laptop bag and plug in when needed. Has anyone done this before? Good idea or bad idea? Obviously backups would be needed due to the possibility of losing a USB drive, but that's not a problem.