Filing away hand-drawn Mind Maps
The great thing about software is that you can store your Mind Maps straight onto the computer and have them filed there. With hand-drawn Mind Maps you may end up with a chaotic mass of paper.
As someone who is keen on computers I deal with paper Mind Maps as follows:
I put notes on a book in the front of the book itself. So whenever I pick up the book concerned I always have the Mind Map readily to hand.
I scan all other maps, for example, notes from meetings, and store them as image files on my computer. I then throw the paper originals away.
In this way you can generate Mind Maps by hand and then file them away digitally and readily access them again.