Google Drive Extension on Jupyter Lab: How do I transfer files to the Jupyter Hub?

I’ve been experimenting with the Google Drive extension to JupyterLab. It shows me the files on Google Drive, and even lets me open them into windows. But what I can’t figure out is how to open a Google Drive file in a Notebook, or copy files from Google Drive into the Hub using the extension. Is there any way to do it, or must I use the Google Drive Python API?