There are however some third-party options and the best among them all is Blogger Backup. This Windows utility that saves your entire Blogger posts to the disk and can easily restore them in case you accidentally delete your blog or some of the posts.
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Blogger Backup follows the incremental backup style so if you run the software again after a week, only blog posts and comments published during this seven day period will be downloaded locally, not the entire blog.
Get Blogger Backup at CodePlex.com.Though we covered Blogger Backup some time back , that version did not play very well with the new Blogger but this new release fixes all the previous problems and is extremely fast. Highly recommended.
Resource: Labnol.org