Dropbox is a cloud storage service where you can backup photos, videos and file. It has a desktop application for your computers and runs on Windows, mac or Linux operating systems. It gives you access to your Dropbox directly through a folder on your hard drive. You need to download and install 'Dropbox Desktop Application' on your computer to get more advantages of Dropbox. When you download and install 'Dropbox Desktop Application' on your computer, it creates a folder on your systems hard disk. The folder is named 'Dropbox'. Anything you drag into your Dropbox folder will automatically sync online and to any other mobile devices or computer which are linked to your Dropbox account. It is very useful and convenient because you don't need to upload or download files in your Dropbox folder manually. It automatically watches your Dropbox folder and keeps your photos, videos and files in sync for you. This application also works when you go offline. Next time when you are online, it will sync changes just where it left off.