If you’ve got potatoes in store, it’s a good idea to empty them out and check them over. If any have blight or other rot starting, dispose of them before they infect the rest of the crop.
An old tip for storing potatoes that I came across in a 1942 government wartime leaflet on the subject..
“Where there is no shed suitable for storing, the tubers may be placed in bags or cardboard boxes and kept in a larder. Quicklime or lime and flowers of sulphur lightly sprinkled among the tubers will help to keep down disease. During late autumn, they should, if possible, be looked over fortnightly and diseased tubers removed.”
Both lime and flowers of sulphur are easily available although this is probably against some modern legislation!
There’s information on the site about how to harvest your potatoes and how to store them:
Harvesting Potatoes Guide
Storing Potatoes Guide
And we cover the subject in our book How to Store Your Home Grown Produce