Here are a couple of storage tips
Storage for 1 month:
Wrap each onion individually in paper towels and then place them in a brown paper bag in the refrigerator.
Storage for 4-6 months:
Get a clean pair of pantyhose and fill each leg with onions, tying a knot between them. This allows air to circulate around the onions. Hang the pantyhose in your pantry or another cool, dark, dry place and cut off an onion as it is needed.