Here is how to install a 3.5" SATA hard drive into your WinBook DVR model D6008DV.Note: Make sure the DVR unit is unplugged while doing this procedure.1. First, remove the screws from the unit and remove the top base, exposing the inside of the DVR.2. Next, line up the hard drive with the premade holes on the bottom of the unit. 3. Turn the unit on its side while holding the hard drive in place - take the screws that came in the DVR's packaging and screw the hard drive in place. 4. Take the SATA Power and SATA cable, connecting both to the hard drive. 5. The hard drive is now properly connected, place the top half back on the unit and screw the screws back in - you're good to go!