The DiskOnKey lends itself to a wide variety of innovative uses. This product is an active device with its own central processing unit (CPU) and is capable of supporting and running multiple applications directly from the product. When using DiskOnKey you can save documents, presentations, cross the boundaries between a PC & Macintosh, and save downloaded music, videos or books. Because it connects with host computers through a USB port, the DiskOnKey is easily utilized. Just plug it in! The host computer will immediately detect and recognize it as a supplementary hard drive.