lol, noone replied...

I vaccum seal bigger batches with silica gel and oxygen absorber, bc why not.

the best way to preserve them is in a jar, bone dry, poudered and with agron gas on it.

It is often said that it is less stable in pouder form bc more surface area, but that is wrong. What has more surface area, the densely packed pouder on the bottom with an inert layer or argon on or or some lose dried mushrooms that cannot even have argon on it unless you fill the whole bloody jar...