If you want to archive your Tumblr blog, there are a few things you will need to do. First, make sure you have a copy of your blog post(s) saved to your computer. Next, you will need to sign in to Tumblr and go to your Settings page. Under Blogging, you will see a option to “Archive this blog.” Click on this button and select the files you want to archive.
You can also choose to have Tumblr automatically archive your posts every week or month. Finally, make sure that the “Keep archiving after this blog is deleted” checkbox is checked and click Save Changes. Your archived posts will be stored in your Tumblr account for as long as you keep logging in. If you ever want to restore an archived post, all you need to do is sign in and find it under the Blogging menu.