This is what I do for our family computer. All our photos and videos are on the family computer, it continuously backs up to backblaze with forever history and we push all our photos and videos to Google Photos, too.

We print the photos we really like and put them in albums. If our house burns down and we lose the albums and computer, we still have Google Photos and backblaze. If either Google or backblaze end their relationship with us, we still have our local copies and albums (and the other service).

We do pay for Google storage and for backblaze, but I think it comes out to around $12/month.