Dropbox is a file hosting service that allows users to access and share files across multiple devices. It was founded in 2007 by Drew Houston and Arash Ferdowsi and offers 2GB of free storage with additional storage available for a monthly or annual subscription fee. Dropbox has raised over $257 million from investors and was valued at $4 billion in 2012. It now has over 200 million users and accounts for 0.29% of global internet bandwidth.