Gateway Tower User Manual page 237

4
If there is a shipping screw installed next to the release lever, remove the
screw, then slide the release lever toward the rear of the case.
5
If you are replacing a drive, slide the old drive forward and out of the drive
bay.
- OR -
If you are adding a new drive, slide the drive bay cover forward and out
of the drive bay.
Upgrading the Gateway Tower and Mid Tower cases
www.gateway.com 229