Removing HDD from Z583
1) Remove the side panel with the air vent by taking out the 2 screws, releasing the clips, and pulling the panel back.
2) Remove the two screws holding the hard drive in, the hard drive will slide out top first
3) Remove the red data cable and the multi-wire power cable
Reverse order if you have a new hard drive to install. Refer to the 2 pictures.