The Ready NAS Duo is perfect for homes with more than one computer. Unlike a USB (Universal Serial Bus) drive, the Ready NAS connects to the network & is simultaneously accessible via all connected Windows or Macintosh computers. If there is a broadband Internet connection & a home router, the Ready NAS can be set up to provide secure access to all the stored files remotely via the Internet. For added protection of stored data, an optional second hard disk drive can be installed. The spare hard drive will keep an extra copy of all the data & instantly take over if the first hard drive should fail. Advanced media streaming support allows the Ready NAS to directly serve media, with no PC required. Officially licensed Bit Torrent client allows downloading to occur without the need for an additional computer. A web-based interface facilitates download management from computers, & a special NETGEAR digital entertainer interface allows management from the select NETGEAR device. Please note: networking components such as switches, routers, NAS & wireless devices require that speeds & standards be consistent throughout the network to gain optimum performance. To avoid compatibility clashes or for advice, please contact us on solutions@ebuyer.com.