Epson ActionTower 3000 Computer - Manuel (Page 73)

Removing Mounting Frames
If you are installing a drive in a 3½-inch wide drive bay and
there are mounting frames attached to the drive, you must
remove them before you install the drive. Follow these steps:
1. On your drive, there may be a plastic guiderail and metal
grounding plate attached to one of the mounting frames. If
so, remove the screws securing them to the mounting
frame and remove the guiderail and grounding plate.
2. Then remove the two screws securing each mounting frame
to the drive and remove the frames.
Installing and Removing Drives 4-3