In order to be able to choose Google Drive as the resource provider you have to first install UnityGoogleDrive (by referencing the GitHub repository in
Packages/manifest.json). Consult the GitHub project readme for installation and setup instructions.
When UnityGoogleDrive package is installed and configured, set
Google Drive Root Path (folder in the root of your drive where you'll store the resource files) in the provider configuration and select the
Google Drive provider for target resource type in the configuration manager accessible via
Naninovel -> Configuration context menu.
You can share your Google Drive resources folder with other users to work in collaboration without the need to use version control systems or other complicated tools.