HP EliteDesk 800 G3 Desktop Mini, HP ProDesk 600 G3 Desktop Mini, HP ProDesk 400 G3 Desktop Mini - Maintenance and Service Guide

9. Remove the screw holder from the solid-state drive (3) for use on the replacement solid-state drive.
To install a solid-state drive, reverse the removal procedures.
M.2 PCIe solid state drive (SSD) 35