Different tool, but this forum post lists some options: https://forum.photostructure.com/t/automatic-phone-uploads/2...

Some of the tools recommended are:

https://syncthing.net/

https://www.resilio.com/

https://www.photosync-app.com/home.html

I'm not the GP but what I do is all my camera devices will sync to a cloud drive, and my NAS then syncs the cloud drive. Google Photos seems to be able to see them. That way I always have two copies of the image, a cloud version and a local.

The main failure mode I'm concerned about is if Google decides I'm no longer worthy of an account. In that case I'll still have my pics and I'll put in the effort to set up some other service.

How do you do this with iPhoto?

With an iPhone it doesn't seem that there is a way to sync with a folder anymore.

I'm unsure how to do it with iPhoto. My guess is it syncs up to Apple cloud, from which the NAS should be able to sync? At least once it's off the phone you don't have the sandbox, which is a bit stronger on Apple devices, IIRC.

My cameras are all Androids, so I use FolderSync to put things in the cloud. It being Android there's still a filesystem that it can scan. I use an app on my QNAP to bring them back home.

I've been using icloud-photos-downloader[0] for a while now, running as a Scheduled Task on my Synology. It supports 2FA as well, I just have to re-auth every 3-4 months.

[0] : https://github.com/icloud-photos-downloader/icloud_photos_do...

Synology has an iPhone app called DS Photo you can use to download pics directly to your NAS.