Ever run out of space on your PC for work files? Can’t squeeze any more movies onto your external 1TB HDD? Drew Houston and Arash Ferdowsi seem to have an answer: the duo has set up a system using which anyone can save a file and access it instantly on any other device. Founded in 2007, Dropbox is a cloud storage service that lets you upload text, images, videos and any other form of data to the cloud through an account and makes it available on any mobile device, operating system or browser. Close to 200 million people have used the service to save a billion files a day, with more than 10,000 servers powering the data exchange. With $250 million funding in its kitty, Dropbox is currently working on a way to help you carry on your work/game on any other mobile device seamlessly. But with Apple’s iCloud and Google Drive snapping at its heels, Dropbox will have to innovate to thrive.