QNAP's Qsync is their file sync service for QNAP NAS owners.
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.