Sorry in advance for the newbie questions, i have never used an external HD... I just bought a Lacie 250 GB external HD, to back up the data on my mini. I backed up my user file, which contains all my documents, photos, videos, and music. Is it worth it to back up my applications (ie make a copy of my entire HD)? Also, do i have to partition it if i want to back up my data and store other stuff on there?