I am fortunate to have shelves and cabinets but I do have overflow storage in clear rubbermaid tubs in the garage. I have my fabrics folded all nice and neat and organized in the tubs. One is flannels, another has Asians, another has McKenna Ryan fabrics and several others are filled with Back size yardage organized by color/type. most of the time all I have to do is look tru the side of the tote to see what I have. Other times I pull off the lid and can see what is in there that I want.
My scraps are in some of those rolling drawers, those are a little more mixed up. Fat quarters are also in those plastic drawers, folded to fit and organized by color/ type so I can see a sample when I open the drawer.