Things You'll Need
Instructions
Adding a Hard Drive to the 360
Stand the console vertically, and remove the hard drive bay cover (the mesh covering on the top panel) by simultaneously pressing down on the gray button with your finger and lifting the front of the cover upward, both located at the front of the top panel.
With the flat end of the hard drive facing the front of the console, align the connector on its underside with the connection slot in the hard drive bay. Align the rear of the hard drive with the lip at the back of the hard drive bay.
Press down on the front of the hard drive until it clicks into place. As it serves no further use, discard the bay cover.
Adding a Hard Drive to the 360 Slim
Lay the console horizontally, and remove the hard drive bay cover from the bottom panel by simultaneously pulling back on the black fins with your finger and pulling the cover outward. (Both components are located at the back of the bottom panel.)
With the "Xbox 360" logo facing up, insert the hard drive into the slot, connector first. Push firmly until you hear a click.
Replace the hard drive bay cover by aligning the teeth with the slots and pressing until it clicks into place.