I wanted to mount my external HDD on the wall next to my also wall-mounted PS5 and I also wanted it to not get too hot so I made it have a lot of vent holes. I hope someone will find a use for it and feel free to edit it to suit your needs. 

My print settings:

Material: PLA

Layer Height: 0.2

Support: No

Perimeters: 3

Infill: 20% Triangular