WD Red or Seagate Exos or any NAS drive, as long as it’s helium filled and CMS, which is usually 10TB or larger.

Home Assistant.

Whoa! My IP has never moved around that much.

If you want a little more security, use a firewall to whitelist your other players and block all other connections. It’s another thing to maintain, but ISP IPs don’t usually change very often.

M-Disc with another M-Disc copy stored off-site. Basically, the only way to get 100% instead of 99.9999% for the next 100 years.

That’s a perfectly good 4TB drive.