Invite your friends to join Dropbox, and for each one who installs, Dropbox will give you both 500 MB of bonus space.
Have been working on my referring and I now have 12.88 GB free Dropbox. To complete 16 I have to invite more friends to try and use Dropbox. Just click on my referral link to try https://db.tt/2B1kDrwL You’ll find Dropbox very useful.
Happy Dropboxing!