Same. I lost a lot of photos this way. I've recently moved over to Immich + Borg backup with a 3-2-1 backup between a local synology NAS and BorgBase. Painful lesson, but at least now I feel much more confident. I've even built some end-to-end monitoring with Grafana.

Careful w that Synology NAS, mine's now a brick that may also have led to permanent data loss.