Open your Blogger dashboard and choose Settings -> Other. Here you’ll see an option that says “Export Blog” – click the link and it will download a copy of your blog posts and comments to the hard disk in Atom (XML) format. How to Backup your Blog Template If you would like to save a copy of your Blogger Theme (or template), choose Template in your Blogger Dashboard and click the Backup button in the top right corner. This will again download the full template in XML format.
Important: The XML file created by Blogger is not compatible with external blogging platforms so if you like to move blogs from Blogger to WordPress, use the built-in import function available inside WordPress.