We store our potatoes in card board boxes and block any light from entering the top with large envelopes or paper shopping bags. The boxes allow moisture to escape and can be thrown away since there could be potato diseases on the surface of the harvest. Individual boxes are easy to open and inspect to see when they need to have sprouts removed. It only takes a few minutes per box once you get used to doing it. In the past we used plastic milk crates we could disinfect with bleach and leave in the sun to dry. They allow light in, but we used a dark basement cold cellar. Potato harvests are many times larger here than any grain and we can Winter over and save our own seed potatoes for next year. That may not be possible in your climate.