The file 'HDD Adapter 3,5 Inch To 2,5 Inch (3.5 Inch To 2.5 Inch) 3D Printer Model' is (stl) file type, size is 97.4KB.
An adapter for HDD 2,5" for 3,5" mounting.Standard #6-32 UNC PC screws are used to mount it.
I created an adapter that is tested and is fitting.