Currently Notebook 7 shows the default file browser on the /tree page:

However in JupyterLab it's also possible to use different drives to manage contents from other sources. For example:

• https://github.com/jupyterlab/jupyterlab-github
• https://github.com/jupyterlab-contrib/jupyterlab-filesystem-access

Ideally there should be a way to switch the default file browser in Notebook 7 to use a different drive.

Or add the drives to the tab panel: