Lenovo ThinkCentre 3231 Hardware Maintenance Manual page 113

4. Press the blue release tab 1 down, slide the hard disk drive cage 2 back,
and pivot it outward.
Figure 19. Removing the primary hard disk drive
5. Remove the hard disk drive cage from the chassis by simply sliding it
outward.
6. Pull on the blue handle 3 to release and remove the hard disk drive from
the drive cage.
Chapter 8. Replacing FRUs - Tower computers
107