When I attempt to move my Aperture library to an external Thunderbolt external HDD, Aperture freezes with the spinning beach ball. It also freezes when I attempt to create a vault on this drive. The HDD is a LaCie 1 TB Thunderbolt drive which was formatted Mac OSX Journalized and works copying and moving other files from Finder. Does anyone have this issue? If so, is there a resolution? Basically, I'm not able to use an external HDD with Aperture files. I'm using Aperture 3.5.1.