Earlier quoted context omitted.
QNAP's Qsync is their file sync service for QNAP NAS owners. https://www.qnap.com/en/utilities/essentials
This is what I use and I love it. Still working out what I want to do for backing it up to the cloud though. It has a very easy built on way to do that too, but im trying to figure out how "trust no one" I am with encryption and what exactly I really want to pay to keep around forever.
I then use cloudsync to backup to GCP nearline. All family pictures are there. Obviously, we don't store stuff that we don't want our mother to see. I take the risk of hacking, but a fire in my house is probably more likely than a hacking of my family photos on GCP. I figure just about everything else is ephemeral.