Or, at least, document how to backup to shared drives.

I'd like to be able to specify what folder/drive to upload to by ID, which would make more sense than typing out the path (at least to me).

So the reason we have you specify the path instead of the folder ID is that due to the Google Drive permissions the plugin requests, the plugin can only create/edit/delete files in folders it creates. Therefore, you can't specify the ID of a folder because that folder would already have to exist.

Similarly, you can't back up to shared drives because of the permissions.

Hope this clears this up!

Can permissions not be elevated?

If we were to elevate permissions we would have to get our app certified by Google and we wouldn't be able to use device code authentication which is extreamly convenient.

We could always have team drive users go through a more involved authentication process, but we still would need to get our app verified and host a simple website to assist with the authentication flow.