How do you backup important things you store in selfhosted clouds?

I’m currently thinking about hosting Ente myself for syncing all my pictures. Maybe also spinning up nextcloud for various other shared files. However, for me one main benefit of using services like iCloud is the mitigated risk of losing everything in case the hardware fails (and fire, theft, water-damages, …).

Do you keep regular updates on hosted services? Do you keep really important stuff on other providers? Do you have other failsafes?