Drivr is integrated seamlessly into the post editor. With a click on ‘Add From Drive’ button it lets you access your Google Drive Account in a Modal Window, which actually is known as Google Drive Picker.
Click on the 
button right next to ‘Add Media’ button in visual editor to get started.
It will open the Google Picker!
Look how it works
Note: The files must be ‘Public’ for users to be able to access them. How to make them public.