Ideal for the home, office, or dorm, Seagate Expansion 4TB STKR4000400 desktop hard drive offers enormous desktop storage for photos, movies, music and more. Backing up and transferring content is incredibly easy — just drag and drop, or use the included Toolkit backup software for on-demand and automatic backup of your files! To get set up, connect the USB hard drive to Windows or Mac — no software required. For Apple Time Machine, simply reformat. Included is an 18-inch USB 3.0 cable and 18W power adapter.
   
Easy-to-use desktop hard drive—simply plug in the power adapter and USB cable
   
Fast file transfers with USB 3.0
   
Drag-and-drop file saving right out of the box 
   
Automatic recognition of Windows and Mac computers for simple setup (Reformatting required for use with Time Machine)
   
Includes Toolkit backup software for on-demand and automatic backup of your files.