However, know that foods that are overdried in some dehydrators may turn brown and become brittle. If you are concerned about the safety of a dried food, you can freeze it. The freezer will keep frozen any water remaining in the food, thus preventing spoilage. You can freeze dried foods at any stage of the drying process. A woman I once met at a home show told me that she only half-dries her mushrooms because she likes how quickly they rehydrate.
Moisture is the enemy of dried foods.
Dried foods exposed to the air absorb the moisture in the air and become limp. Always store dried foods in airtight containers and label the contents. Store the containers in a dry, dark place with a moderate temperature. Your kitchen cupboard is an ideal spot. After all, dried foods take up so much less space than fresh or canned ones that it is easy to keep them in a handy place.