It’s a pretty simple concept.an internet drive that allows you to sync your files between multiple machines. a small application is installed that monitors a folder on your hard drive. Dropbox monitors changes to that folder and if a file is updated it is pushed up to your virtual drive . If you have multiple machines with Dropbox installed and pointing to the same account then they will automatically sync your files.

While this sound like something that can just as easily be accomplished with a network share, the nice thing about Dropbox is that the files are automatically copied to the machine’s local drive. In my case I have two physical machines Desktop(Windows Xp)  and an Laptop(Windows Vista).  As I am currently working on the project I am jumping between machines frequently; now if I make a change to files  see this little notice pop-up on each machine

So if I make a change anywhere it is auto-reflected wherever I need it. If I then grab my notebook  for a meeting and the place I’m going doesn’t have internet access I still have a locally updated copy of the files that will be updated as soon as I get back to a live connection.

If you are away from your machine and need access to those synchronized files you can log in from anywhere and download the files from your account. You can also place your files into a public folder that will allow you to share them with others.

Dropbox comes with 2GB of storage for free; you can upgrade to a 50GB version for $9.99 / month or $99 / year.

Read more/Download : visit http://www.getdropbox.com/

Dropbox, Sync your files