Facebook allows to download your Facebook data (contacts not included though) in a Zip file similarly recently launched Google+ Social network from Google also allows to backup all your data in Google+ account such as photos, posts, stream, circles and contacts in a Zip file to your Computer using their Google Takeout tool.
Google allows to download following data from Google+ to your Computer
- Google Contacts
- Google Buzz
- Your Google Profile
- Picasa Web albums and Photos
Backup Google+ Data
If you are already signed into Google+
1. Click your full name or email address on right side top of the screen
2. Click “Account Settings” and click “Data liberation” tab on the left side
3. Click “Download Your Data” and follow instructions on the screen. Google does asks you to type your password for verification even though you’re already signed in.
You can select “all of data” or select one or more services and click “Create Archive” to start downloading Google+ data in a Zip file. Downloaded Zip file will be saved with “firstname.lastname@example.org- backup” filename .