Turn the camera so the bottom casing is facing up.
Next, use a PH00 screwdriver to remove the screws from the bottom casing.
Remove the four 5.3 mm Phillips screws.
Remove the three other 6.3 mm Phillips screws.
Be careful not to strip the screws.
Next, use a plastic opening tool and carefully pop off the bottom case.
Then, lift and remove the bottom case.