It's part of the 3-2-1 backup setup, but where other people have their "offsite backup" in the cloud, I keep my working copy there, and have backups at home.

I outsourced operations of it though. I have self hosted for decades, and for the first time in 15-20 years, I'm able to take a vacation and not bring my laptop in case something breaks.

As for main storage, as was probably evident from my comment, I don't have 30TB of cloud storage. We have our important stuff in the cloud, and "everything else" at home, but nothing at home is accessible from the internet unless you're on a VPN.