Giving it here more as idea for others as is specific to Dell machine.
Have Dell precision T1700 (big). And needed to add at least 2x SSD drives. As problematic to mount it due to Dell case, I decided to design a holder.
Important note: The top row of holes (1cm between each) is specific to the Dell case. So not useable in regular case and probably also not useable for regular HDD holes.
I printed it with PETG as I will have there 2 SSDs. But not sure how it will react, if all 4 with 2,5" drives are filled and used ( temperature issue ).
0,2mm Quality profile extended to 0,3mm profile on Prusa Mini.
No support needed, if correctly rotate the "window"s.
Just in case I added also brim 3mm around, but not sure if needed
The author hasn't provided the model origin yet.