I never use bolts as they take up too much space which I don't have. I did bring some home from Joann's but ended up throwing them out.
I use my 6 1/2" x 24" ruler to roll the fabric on, like a bolt, then slide out the ruler. I then fold the fabric into halves or thirds depending on where I am storing it. If I know the size of the fabric, I mark it with a slip of paper and put it on the inside selvage.
Otherwise, I can pretty much tell how much I have by the thickness of the fold.
This is a very neat, organized and space saving technique.