I think you're asking two different questions. For "short term" packing and shipping, I'd carefully roll it with the zipper closed trying carefully to avoid any sharp bends in the zipper. I might suggest bringing the feet up to back of the the waist, then another fold at the thighs, wrapping the torso and shoulders around that pack so you're not squishing the zipper into the middle of the pack avoiding any small radius zipper bends.
For "long term" storage, I'd unwrap it and hang it from a wide hanger zipped up in a cool dry place free from any sunlight, hydrocarbons or oxidizers (in the clothes closet, rather than the garage, basement, or storage shed).