Dropbox is an internet based service that offers file hosting capabilities. The service allow you to store files on-line and synchronize them to one ore more personal computers. All you have do to use Dropbox, is to register with them and install the synchronisation application on your computer or mobile phone. The installation creates a special Dropbox folder on your hard drive. All files placed in this folder will be synchronised with all your other devices that have the Dropbox software installed. You can also access your Dropbox files on-line by logging on to their website.