Just found this little gem of a program for storing and organizing reference images, thought y'all might be interested. I'm just getting into using reference images more and more, and this app does this simply, cleanly and even better, cheaply :)
https://www.pureref.com/
I have no connection to them at all, I just bought a copy and its pretty slick, especially if you have multiple monitors. Very simple to use, just drag and drop images on the canvas and a lot of the navigation controls are similar to KS already, which is a bonus! Really helped my workflow on the last project I did.
I also use this. Pretty great.