Here's a quick and easy way to get the maximum amount of storage you can.
Get a printer as this will be helpful in making a printer compartment. I found a broken printer to use.
Remove the paper tray. This will be the base of your compartment
Proceed to remove all the plastic panels.
Use J.B. Weld or other super glues to glue the panels back to the paper tray.
Place it next to a computer so it doesn't seem odd and then you are done.