I've come across a few bloggers this past year who have somehow lost all their posts. I honestly don't know how that happens and thank God I haven't had that experience. I can't even imagine what that must feel like! Months, even years worth of hard work gone just like that. That would be horrible! The good news is that you can back up your blog (posts and comments) onto your computer to make sure you're prepared for something like that. Do you know how to do that? If you have a Blogger blog, I'll show you how in 3 easy steps :)
Step 3: Now download and save!
To import that Blogger export file onto your blog, go to Settings | Options, from the "Blog Tools" section click "Import Blog" and upload your file. All of your posts will remain unpublished until you manually publish them. If you want them all to publish automatically after being imported, make sure the box next to automatically publish imported posts is checked before you click Import Blog. And that's all there is to it :)
Again, I hope you found this at least a teensy bit helpful! If you have any questions, let me know and I'll answer the best I can.