Got a NAS? Backup your NAS at your buddys NAS. Backup your NAS at multiple buddies of yours and backup the NAS of multiple buddies of yours in your NAS.
Rumors say this feature will be a decentralized protocol compatible with unRaid and maybe even TrueNAS
Sadly HexOS is a paid product, if I was wanting to recommend an OS to start a homeserver with I would probably recommend Umbrel OS (Umbrel sells hardware but their OS can run on other hardware that reasonably works with Linux) or maybe TrueNAS if the purpose of the server is just to be a NAS.