Dropbox is a file hosting service which allows you to backup photos and videos to access them from anywhere. It is available for Android, iOS, Microsoft Windows, OS X, Linux, Windows Phone, Symbian, BlackBerry OS and MeeGo Harmattan operating system. This access allows Dropbox for Android to include features that make use of your camera. If you upgrade a Dropbox Pro plan, you need to enter your debit or credit card number. You can choose to scan your card using your phone's or tablet's camera, instead of typing in your card number.