Lian Li MIni is a fantastic case, but HDD temperatures exceed 50C as no air moves anywhere near the HDD cage.

This thing replaces standard cover with a custom one that houses two 40mm or 50mm fans.

With fans set to 2000 RPM temperatures drop up to 10C in my case.

I used 8 M3 15mm screws to hold fans in place, there are some indentations inside the holes that screws will bite into.