Buffalo HD-H0.6TGL User Manual page 76

14
Remove the 4 screws from the sides of the failed hard drive. Note that
the hard drive chassis is marked with numbers corresponding to the
drive numbers on the front display.
4mm HD screw (note that the threads are coarser than
the M3 screws; please do not get them mixed up!)
15
Remove the failed hard drive from the chassis.
16
Install the replacement hard drive.
Replacing a Hard Drive
76