It’s a free service that puts a magic folder on your computer desktop. Anything you put into it magically appears in an identical folder on all your other computers.

That simple concept offers a wealth of possibilities. You can work on a project at the office, then go home and pick right up from where you left off. Those same files are in the same Dropbox folder — without ever having to send them, carry them or transfer them.

You can also consider Dropbox a simple, automatic backup system.

via Dropbox Will Simplify Your Life – NYTimes.com.