CAUTION: To maintain proper system cooling, all empty hard-drive slots must have drive blanks installed.
If installed, remove the front bezel.
Removing A 3.5 Inch Hard-Drive Blank:
Grasp the front of the hard-drive blank, press the release button and slide the blank out until it is free of the hard-drive slot.
Installing A 3.5 Inch Hard-Drive Blank:
Insert the hard-drive blank into the hard-drive slot until the release button clicks into place.
If applicable, install the front bezel.