How to back up and reinstall posts and comments on blogger/blogspot blog
Learn how to backup and restore your blogger/blogspot posts and comments with a few mouse clicks on bloggers site.
Click on Settings tab then Basic link and click on export blog.
To reinstall, your blog on another blogspot acount, go to setings, Basic, and click on “Import Blog” link
Import Blog link
Next, click on Browse and open the blogspot.xml file you downloaded, type in the word in the texbox, and click import blog.
Click import Blog