I need help again,hard drive help! With my IMAC 27" fully loaded coming soon, i need an external hard drive to store/run .mov .aif and .jpg (video, music and pictures) files. I plan to store all my .aif .mov and .jpg files into this external hard drive as i do not want to use the Fusion drive for all of these files. Can anyone recommend a hard drive? USB3 or Thunderbolt? Will i be okay with a regular HARD DRIVE 7400 or do i really need a SDD for this? Thank you!