Dropbox is a cloud storage and file synchronization service that allows users to create special folders on their computers which Dropbox then synchronizes so that files placed in this folder can be accessed from any computer via the Dropbox website and mobile apps. Dropbox was founded in 2007 and provides client software for Windows, Mac, Linux, Android, iOS and other platforms that enables files to be automatically synced and shared across multiple devices. The document then provides basic step-by-step instructions for how to sign up for Dropbox and upload a file.