How to store Onions?

Whole onions should be stored in cool dry and dark place. The sunlight can make the onions taste bitter

The onions easily absorb moisture, making them mushy.
An old American technique is to cut a leg of a panty hose, and slide onions in one at a time and tie a knot. The hose is kept away from sun in the basement where it is cool. You can store onions this way for about 4 weeks.
Onions can be chopped up and put in zip-lock bags. Chopped onions can be stored in the refrigerator for 30 days. Chopped onions can be frozen for about six months.
Do not store whole onions next to whole potatoes, it will spoil them both.