I have a wooden tool box my dad had in the back of his truck. I can get about 100 lbs in it. I put a little top soil in the bottom. When I fill it with potatoes, I leave it open a little for a few weeks to dry the potatoes. Then close the cover. This box is in my garage which I heat during the day, if I’m out there. Rest of the time it’s kept at 47 degrees F. The potato box is next to the man door and is as far as it can get from the wood stove. And it’s on a outside wall. Never had a bad potato. The blue potatoes tored last year were still just as good and hard as when I put them the tool box. They were put in at the end of September and took out in the end of May the next year. Some were soft, but most were hard. Could have cooked instead of using them for seed.
The rest are hug in burlap sacks or onion type bags for ventilation, in my sister in laws clay basement. Cool and dark. Never had a bad potato there either.
Dry, cool and very dark is my thinking. Works for me. I don’t wash mine, I leave the dirt on them. Better for storing, they say.
Noel