Print a pair of springy mounts to attach a 2.5" HDD or SSD to a panel with #6 screws. I made this to add a backup drive to an arcade cabinet to help protect an old notebook drive I repurposed, but it can be used just as easily for PC test rigs or attaching to a raspberry pi case.
The double drive versions are stacked close together (0.1" spaced) or further apart for better heat dissipation.

Prusa

i3 MK3 MMU 2

No

No

0.30mm draft

5%

Keep infill as low as possible to help keep it flexible.