I keep hearing about the boards used to fold and store fabric, and from what I hear, they're not cheap. Why not use the cardboard that bolts of fabric come on? I've used this for years and never spent a dime on a "board". They're free anywhere that sells fabric. I have closet shelves in my walk-in closet. They're three deep on the back wall and two sides. I have over 400 "bolts" stacked on end in this closet. I sort by color family and can easily "shop" for what I need. My only investment was for the shelves. The cardboards are replaceable for free.
I attached a couple of pics to clarify what I mean.