Photos sync automatically from camera to Dropbox Camera Uploads folder. I move them every now and then into a Dropbox/Photos folder (not syncd to local machine as it's too big) after organising them into month folders. These same organised folders are copied onto an external drive from local Dropbox Camera Uploads folder. This external drive is then Rsync'd to a backup drive that I keep in a safe.

I still have Dropbox as a backup this way so it's a cloud backup of sorts.

Not foolproof but it's super simple and good enough for me.