Acer AcerAltos 21000 System Manual page 44

5. Secure the drive with a screw. The screw hole is located on the
side of the housing.
6. Connect the power cable and signal cable to the external device.
7. Close the left panel.
To remove a 3.5-inch storage device:
1. Open the front panel door and remove the left panel. See section
2.2 for more information on opening the housing panels.
2. Disconnect the power and signal cables.
3. Detached the external device by removing the screw located on
the side and then gently pulling out the device.
4. Remove the four screws and detach the 3.5-inch drive from the
drive guide.
System Housing 2-19