Acer Gateway LT31 Series Service Manual page 51

6. Lift the hard disk drive module out of the bay.
NOTE: To prevent damage to device, avoid pressing down on it or placing heavy objects on top of it.
7. Remove the four screws (two each side) securing the hard disk to the carrier.
Step
HDD Carrier
8. Remove the HDD from the carrier.
Chapter 3
Size
M3*0.5+3.5I
Quantity
4
Screw Type
41