Hi Kathy @kjmcinerny , sorry for the late reply.
I tend to trace all my patterns, including the BBD block on thin interfacing (known as Trace and Toile, and similar to Swedish tracing paper).
Then I store each pattern tracing in a clear plastic sleeve in a ring binder.
I have all my ring binders labelled with which patterns are in them and it’s all alphabetically sorted (yep, seriously 🙂 )
Now that might seem daft as I only have one daughter, so patterns are outgrown before they’re made for the second time, but it’s oh so handy when I need to whip something up for a smaller kid’s birthday.
I have one folder, which is rather bursting at the seams which is my mash-ups and heavily altered patterns folder, and that’s were I keep my BBD blocks.
Have fun with the book!