Abstract: A removable computer component module includes a plurality of drive trays each adapted for receiving a computer component. Each of the plurality of drive trays includes front and back ends at two lateral opposite ends thereof, two first and two second engaging portions arranged at two vertical opposite ends thereof. The two first and two second engaging portions horizontally extended from the front end to the back end. The two first engaging portions of one of the plurality of drive trays are engageable with the second engaging portions of the other of the plurality of drive trays to form a vertical array without tools.