Dropbox is a file hosting service used for personal cloud storage, file sharing and collaboration. Users get 2GB of free storage (and up to 16GB if you invite your friends). The application is available for Windows, Macintosh and Linux desktop operating systems. Dropbox is very easy to use, simply drag-drop files into the Dropbox folder that sits on your hard drive and the application will sync online and to all devices that are connected to your Dropbox account. Never fear about losing your files again!