SSD disk holder for HDD mounting.

The mount is screwed onto standard M3 computer bolts. Before that, standard M3 nuts must be pressed into specially prepared slots.
The model in the STL format is in poor quality, it's better to take it in STEP.
I took the SSD model here: https://grabcad.com/library/samsung-ssd-1
I took the HDD model here: https://grabcad.com/library/hdd-sata-3-5-in-1