No, I'm pretty sure the import has to be done via desktop.
The import suggests it can accept *.md, *.markdown and *.txt files, anything else seems to get ignored.
To be clear, if you imported files as per the below folder structure:
/Notebook1/SubNotebook1/Note1.md....Note3.md
/Notebook1/SubNotebook2/Note4.md....Note6.md
/Notebook2/Note7.md
Then you will end up with:
- Notebook1
- SubNotebook1
- SubNotebook2
- Notebook2
4 Likes