I used non-transparent plastic totes to store my fabrics and arts stuff in a storage for over a year when we moved 20 years ago. I made sure there were no pins or any metallic parts on the fabrics, and I added some fabric softener tissues within the boxes (do not place the fabric softener directly on the fabric, rather wrap it first on a paper towel and store it on the sides). I still have have of these fabrics in my sewing room and they still look as good as new.