I store my small fabric pieces by color in clear boxes. I've heard that plastic is not good for them but I haven't had a problem. Creases do form over time and I don't refold them..... I have a lot of fabric. I just iron out the creases when I'm ready to use them. Spraying with a little spray sizing helps keep my small pieces firm till they are sewn into a quilt. Don't used starch..... it's made of grain that attracts critters.