It is very very important that you backup your blogger posts and articles as you may lose lot of hardwork if Google deletes your blogger blog.
How to do it
Visit the Settings option and in the Other options, you will see the Export Blog link. Click that link
Now you will see a page with a Download Blog button. Click the button and start the process of taking a backup of your blog posts.
Blog now in safety
And you can easily retrieve posts for a way
Visit the Settings option and in the Other options, you will see the Import blog link. Click that link
- select an exportes blog file (.xml)
- type the tow words
- Click ( import blog)