I own a airport which I use to connect my mac mini. I will be getting a new iMac soon and would like to know what is the best way to have a Time Machine drive hooked up so it will back up both Macs. Option 1 : Should I manually hook up a external HD for Time Machine to use on the back of the Mac Mini. And on the iMac the same with another external HD for Time Machine. This way they will have their own Time Machine. Option 2: Could I Hook up a larger HD Drive like a 1 TB external drive to the airport's USB connection in the back of the airport to work as a Time Machine for both machines. If I use option 2, will that slow down the performance of the network if the time machine is constantly backing up each hour? So what is the best way to handle this? Any suggestions would be appreciated and would love to hear from anyone who has done this? Thanks in advance.