2-20AcerAltos 21000 System Guide2.3.2 Installing and Removing a 5.25-inch StorageDeviceThe housing comes with a drive guide for installing 5.25-inch internalstorage devices.To install a 5.25-inch storage device:1. Open the front panel door and remove the left panel. Seesection 2.2 for more information on opening the housing panels.2. Remove two screws to detach the metal cover.