Since files added to the Dropbox folder are stored on your Mac and on the Dropbox servers, using this free application provides a quick and easy way to backup important files offsite. If your computer is lost or stolen, recovering these files is as simple as logging into the Dropbox website or installing Dropbox on another computer.
Dropbox also provides a free and easy way to sync files on multiple computers. Simply install Dropbox on the other computers and link your account to the Dropbox folders of those machines. Changes made to files stored with Dropbox on these computers will automatically be synced to the server once the machine connects to the Internet. The next time you login to your Mac at home, changes made from another machine will be downloaded from the server and your files will be updated.