iFixit

The subwoofer is still connected to the right speaker, so don't completely remove it just yet.

Lift the subwoofer off the optical drive, and set it above the computer.

Remove the two 8.4 mm Phillips screws securing the camera cable bracket to the upper case.

The right screw may remain captive in the camera cable.

Lift the camera cable bracket out of the upper case.

Remove the three 2.5 mm Phillips screws securing the optical drive to the upper case.

Lift the optical drive from its right edge and pull it out of the computer.

Remove the optical drive cable by pulling it straight away from the optical drive.

This connector is particularly deep, so be sure to pull away from the drive at the center of the connector.

If you have a CD or any other object jammed in your optical drive, we have an optical drive repair guide.

Remove the two black Phillips #0 screws securing the small metal mounting bracket. Transfer this bracket to your new optical drive or hard drive enclosure.

Remove the plastic spacer from the optical bay hard drive enclosure by pressing in on one of the clips on either side and lifting it up and out of the enclosure.

Make sure that the hard drive connectors are facing down before placing it into the enclosure.

Gently place the hard drive into the enclosure's hard drive slot.

While firmly holding the enclosure in place with one hand, use your other hard to press the hard drive into the enclosure connectors.

Once the hard drive is snug, reinsert the plastic spacer while holding the hard drive against the bottom of the enclosure.