Google Takeout is a “Data Liberation Platform†by Google which allows users to export their data from a number of Google products or services like +1, Buzz, Contacts and Circles, Picasa Web Albums, Profile, Stream, Voice, etc.
You can go to Google Takeout and choose your own product or service to download the data related to it which was submitted by you in Google or you can download all the data at once by clicking on the Create Archive button under the “All of your data” tab.
This Google Takeout is really a good tool from Google team which actually shows how Google securely stores each and every data which was submitted by us.
So go and take the backup of all your data stored in all the Google services!