Use Google Takeout

Go to https://takeout.google.com/   and choose which data you want to save from Google Takeout.  If you want to ONLY download Google Drive, you can click  Deselect All  at the top and then check the box beside Google Drive  and scroll down and click  Next.  
 
   
 Make sure the Options are Selected to Send download link via email, and export once and then click  Create Export.