http://forums.dropbox.com/topic.php?id=52900
Plug in a drive that prompts an autorun and pick "open with dropbox" and for ever 500MB you import, you get 500MB space for free up to 4.5GB.
so u can get a total of 4.5 gigs on top on its max???? time to add space to my Dropboxes.
Yes, so if you had 2.0 (the basic without referrals) then you could be at 6.5