I'm looking for a vote of confidence. I'm about to transfer my entire library (300 GB of mostly movies) off of my internal iMac drive onto an external drive. I will be using iTunes to migrate the entire library over. 3 things- -To anyone who has done this before, how long will it take? I am tranferring it from my internal hard drive to a firewire 800 Drobo. -Anything to know other than not to turn off the computer, and just for safeties sake, shutdown all processes and pretty much walk away from the computer? -To anyone who has used the Drobo, if I initially select 2TB as my drive size, and later have 4 1TB drives in there, does the drobo automatically change that initial size selection to compensate for the additional space? And, if so, what's the point of initially selecting a hypothetical drive size at all? Thanks in advance.