As long as they are fully dried they should be good for a long while
If you are worried about it (and your living situation allows it) just toss them in the freezer. Freezer will keep'em nice.
) are stored in a basket, put high on the shelf in her room away from sun.Don't do this. It can cause the cells in the shrooms to burst and it'll fuck your shrooms up.
I put mine in a bag then put that bag in a glass jar and put that jar in a dark place.