I'm sure this can be much improved upon, but this is how I've been making and storing my powder. The type I made here is very fine grade. I'm going to smoke the next batch before drying, then try to get a coarser/flake type consistency, maybe using a mortar/pestle or a different processor. The fine type is great, but sometimes the bigger pieces are better depending on how you're using them.
https://youtu.be/7N8oyvRkkQ8
https://youtu.be/7N8oyvRkkQ8