Last year Google Takeout allowed users to download their original YouTube videos. Now it also allows users to download their Blogger or Google+ pages data. Google is now removing the gaps which existed in Data Liberation.
The Blogger data gets downloaded as an Atom XML file. If the data to be liberated is too large, it can be reduced by separately selecting each blog. The Google+ pages post will get downloaded as HTML file and the circles tagged in the post will be included in a JSON file.
This data can be used as a backup.