One article suggested to store yarn as you bought it. In other words if it is a shank leave it shanked...don't use your ball winder to un-shank it until you are ready to make that sweater. Score one for me...6 shanks intended for a knitted sweater...still shanked for six years after purchase.
If your yarn is in a wrapped pull skein like Vanna's yarn is sold...for sure leave it for ease of pulling from the center. Of course that is after you have dug through the center for the LOOSE end to begin and finally have to pull out a baseball size wadded tangle in order to begin. Score another for me...most of my yarn is pull skein with left overs wound on Ball Winder, re-wrapped in original wrapper and stored with like yarn.
Now comes the storage container question. Should I stay or should I go? STAY with baskets, plastic bags and plastic tubs...or...GO with eco-safe, breathable, easy access and economical containers. I'll let you read This Article about storage containers and you can decide what works best for you.
I decided to GO!
Shanked sweater yarn...still shanked, breathing, and waiting for Pigs to Fly!