Epson 3865X Plus - Manual (Page 216)

2. Remove the retaining screw securing the hard disk drive
mounting plate to the computer and set it aside.
screw
3. Tilt the hard disk drive slightly to the right, away from the
subassembly, and lift it out of the vertical mounting area.
Turn it over and set it on top of the subassembly with the
gray mounting plate facing up. Since the drive is attached
to its cables, make sure you do not try to move it too far
away from the subassembly as you turn it.
Installing and Removing Disk Drives
B-25