I about to make a switch from Windows to Mac, and I am still learning, so I apologize if this question is really elementary.... I will be getting a Thunderbolt display to use with my MBP (and my wife's MBA) when I am working at home. Until I can come up with the money for a NAS (all these Apple purchases at the same time have tapped me out!), I would like to leave an external USB hard drive plugged into the Thunderbolt display (for backup and file sharing). My question: when I unplug my laptop from the display, do I need to dismount/eject the external drive first? If so, what would happen if I forgot and just disconnected with the computer still powered on? Any help would be appreciated.