Hi @Joachim Albertsson no, there currently isn't a built-in backup functionality for Azure Static Web Apps specifically designed to create backups for static content (HTML, CSS, JavaScript).
Azure Static Web Apps are designed to integrate seamlessly with Git repositories like GitHub or Azure Repos. Version control systems inherently provide a form of backup by tracking changes and allowing you to revert to previous versions if needed.
If your applications require backup and restore capabilities, you can check out App Service Web Apps for the Basic, Standard, Premium, and Isolated tiers.
Hope that helps.
-Grace