Comment by jkn

The Data Liberation Front team was formed at Google in 2007, and released Google Takeout in 2011, worldwide, well before the other big companies had anything similar in place.

http://dataliberation.blogspot.com/2011/06/data-liberation-f...

For more up-to-date information see the Wikipedia page:

https://en.wikipedia.org/wiki/Google_Data_Liberation_Front#c...

This service works quite well, I'm using it to backup the whole of my Google data every few months, including Gmail, Photos and Drive.