I keep my potatoes in banana boxes on the floor at the back of the garage. Agria seem to store best. It pays to check them over from time to time.
The problem with clamps is that you have to go out into the garden when you need a few spuds, and you disturb the heap. For years I just left the potatoes in the ground and dug them as needed.
Garlic and onions go into mesh crates nearby, but off the floor. Pukekohe Long Keepers store well, but this season I am trying Perfect Keeper from Egmont seeds.
5 acres, Ferguson 35X and implements, BMW Z3, Countax ride on mower, chooks, ducks, Kune Kune pigs, Dorper and Wiltshire sheep. Bosky wood burning central heating stove and radiators. Retro caravan. Growing our own food and preserving it. Small vineyard, crap wine.