I buy sugar at Sam’s in 50 lb. bags as a matter of routine, since I do alot of jelly and jam making. After the prices settled after the spike a couple of years ago, I bought 150 lbs. to keep as a part of my cache of food, and I use the FIFO method for use. Sugar is much cheaper when purchased in bulk and it does not go bad.
Well, thought about how to store sugar and it strikes me old coffee cans would be a good, low cost, option for securing a large quantity of sugar.
My only worry about sugar is ants getting at it, otherwise you can do quite a lot with it, even curing and storing meat by coating it with sugar.