I am in the market for a 2TB external to use with my brand new MacBook Pro running mountain lion. I've been led in circles reading reviews about many brands and their mixed reviews to the point that nothing stands out from the rest. Can anybody speak from experience and point me in the direction of something in the $200 price range? As mentioned, I will be using this with my MBP, so I was wondering, am I able to hook this up, and run backups a couple times per week versus leaving it plugged in all the time for scheduled hourly time machine back ups? I don't want to have to lug around a plugged in external when i'm mobile with my MBP which is often. For MBP users out there on this forum, how do you go about using Time machine w/o leaving it plugged in 24/7?