I have downloaded a footprint from a web of a pin header and after copying it to my own-made footprint folder, I’m not able to load it in the footprint editor.
Also there is something that call my attention about that:
The footprint that has not the same type is the one that I have downloaded. The name has the .kicad_mod. The others are made by me.
About the question that maybe is not compatible with Kicad, the answer is that the owner had different footprints depending on the software you are interested in. I downloaded the Kicad one.