In the world of cloud storage and file sharing, few companies are growing faster than Dropbox. Since January 2010, the service has grown from 4 million users to more than 25 million users, and more than 200 million files are saved daily. However, YouSendIt wants to go toe-to-toe with Dropbox in a new arena: pricing. YouSendIt is best known as a convenient alternative to email when you have large files to send. However, it will now offer a cloud storage service similar to Drobox’s, but with a low-price unlimited plan. “YouSendIt is how business gets done online,” said Ivan Koon, the company’s…