Continuing the discussion from Multiple Profile on Android?:
One feature that would be useful would be a way to have a Library or Archive of notebooks. Each Library would have its own set of notebooks and could serve as a way to collect notebook sets for major research topics or timeperiods. For example, a research topic that requires multiple notebooks, subnotebooks, etc would have its own Library. Or, each year could have its own set of notebooks, making archiving easy.
I would envision this could be accomplished by moving the Joplin resources/files into separate folders for each Library.