First, for reference, please note :-) that notebooks are not
individual files but rather bundles with an extension type of ".bbnotebookd".
BBEdit's default notebook is stored within its app support
folder, and is always available by selecting Window -> Notes.
Alternatively, you may create stand-alone notebooks via File ->
New -> Notebook... and store these in any available filesystem location.
Last but not least :-) you can determine the location of a
stand-alone notebook by closing all open notes and then
Command-Clicking the notebook's name in the title bar to show
its location.
Regards
Patrick Woolsey
==
Bare Bones Software, Inc. <
https://www.barebones.com/>