I am trying to decide between which of these large storage options I should chose. Currently I have an imac with 1 tb in and 1 tb via USB with a 2tb connected via FW as a time machine. I currently have about 80gb free on the external and 90gb free on the internal. Now, for whatever reason, I am going to be separated from this setup for about a year. In my new setup I am building I am looking for something large enough to house all of this data and has room for expansion. Does anyone have any experience with these two set ups?