Why?

https://news.ycombinator.com/item?id=12972554

Gmail

http://gmvault.org/

gmvault sync your_email@gmail.com -t quick -d /path/to/folder

Google Drive

http://rclone.org/

rclone sync googledrive: /path/to/folder/

Google Photos

http://rclone.org/

rclone sync googlephotos:media/by-day/ /path/to/folder/