"How to Harvest and Store Potatoes Video"
https://www.youtube.com/watch?v=kpqnCYRf72g
Harvest by digging up. Discard very small potatoes, those with green skins, or damaged ones.
Dry for an hour.
Clean off "heavy amounts" of dirt with a soft-bristled brush. Sort according to size: small, medium, large.
Cure: He puts his in his elaborate, ventilated root cellar, with temperature steady at 45 - 60 degrees and high humidity, for 2 weeks.
He then packs them in layers in boxes, with straw between layers and ventilation holes in the boxes. Keeps temperature at 35 - 40 degrees.
"Vegetable and Fruit Gardening: How to Harvest & Store Potatoes"
https://www.youtube.com/watch?v=4xDdM8Na2u4
Note: can be stored in refrigerator, but as soon as they are taken out, they rot.
