I have a server in the garage with a big RAID array, and I run a Nephele WebDAV server on it. All my PCs, and my family’s PCs back up to it every 3 days.
It also streams all my movies and TV shows on a Jellyfin server.
Also, to be extra cautious, I have a server at my in laws’ house with a 20TB hard drive that I periodically sync that RAID array to.