You can archive, back up, and cite your work using GitHub Enterprise, the API, or third-party tools and services.
When you archive a repository, you are letting people know that a project is no longer actively maintained.
You can archive a repository to make it read-only for all users and indicate that it's no longer actively maintained. You can also unarchive repositories that have been archived.
You can use the API to download and back up your repository manually.