I was wondering if the Google Drive backup option creates a visible/ physical file on your google drive. I was hoping to download it from GDrive just to have a local backup but I can't seem to find the files. Any idea on if a file is created and physically placed in your GDrive?
We store the backups in a hidden folder for application data, which is only accessible from this application (more info: [httpsdevelopers.google.com/drive/api/v3/appdata](httpsdevelopers.google.com/drive/api/v3/appdata)) 

On top of that, the backups are in a custom file format that you could not open anyway

You can only access and restore the backups from your Aternos account, but you can download your world from the worlds page and create your own world backups that way.