We honestly leave ours in the ground and dig up what we need, cover the plot with black fleece during hard frost until spring. All the serious folk will go NOOOO, but as we don't have rodent proof storage space it is the best option. We usually do have pretty good tatties all through the winter, the odd rotten one but at least the rot hasn't spread to all the others in the bag...Plenty of free seed potatoes this way too ---:&>