This B&H Kit includes the Drobo Transporter and one 500GB hard drive. The Transporter allows you to sync, share, protect and access your data anytime, nearly anywhere you go. Add in the included 500GB hard drive and you have the necessary storage capacity to save a large number of files such as movies, videos, photos, documents, and more. Those files can then be transferred to and from a variety of devices including iPhones, Android based devices, and PCs. Additionally, you can create backups of your important files, and even access files across multiple Transporter devices.