Do you need to include in the download, or just the text? Once I know, I can give you the exact steps.
Go to Google Takeout to export Blogger data, which generates a zip file containing Atom feeds and media. Download Nksyshh zip
Manually download your wp-content/uploads/ folder via FTP/File Manager and export your SQL database through phpMyAdmin. Do you need to include in the download, or just the text
Within Blogger, go to Settings > Manage blog > Back up content to get an XML file. Other Options could you tell me:
Install a plugin like "Export Media with Selected Content" to generate a comprehensive zip.
A tool used to download entire websites for offline viewing. Blogbooker : Creates PDF archives of your blog posts. To make sure this works for you, could you tell me: