If you have your own blog, hosted on your own hosting account, you can typically back up the database, and the template and images folders. If your blog is hosted by someone else though, you’ll have to do it another way.

You can export your posts, and comments. If you do that, it won’t be the same as backing up the entire installation, but it will allow you to get it back fairly quickly.

Look in the backend of a WordPress install, and click the Manage link, and you’ll find the Export link under that. It will create a file that can be imported into another WordPress blog. That means if you ever want to move it, you can do that too.

It is a good idea to export every week or so if you feel that you need to have your own backup – some platforms have a reputation for deleting blogs at random, so you might want to do that just so you have your posts in case something happens.

You also have the option of saving a file on your hard drive, where you can keep a copy of each post. It is a little less flexible in some ways, more so in others, because you can more easily get at a single bit of text.

If it matters to you, keep a copy.