> So what will happen to your photos when Google decides to "sunset" Google Photos?

I'm pretty sure you can export your photos from Gooogle Photos via Google Takeout:

https://support.google.com/accounts/answer/3024190?hl=en

If Google sunsets Google Photos, they absolutely will provide a way to export them first.

Obvious suggestion, but: this is why I have my phone automatically copy new pictures to Google Pictures, OneDrive, and Dropbox as soon as my phone gets on a good wifi connection.

Maybe I'm naïve but I really cannot imagine Google shutting down Photos with no notice. So if they say they are closing it, I'll just downloaded them en masse and upload elsewhere.

May I ask which software/app you use that can do this?

I think all of those apps have an auto upload feature for your photos

They may have changed it, but if I remember correctly that guarantee in the original quality only lasts for 2 years. So after uploading photos for 2 years, everything is converted to lower quality. They'll also implicitly use your photos for facial recognition and I don't believe there's a way to disable this "feature."

The Pixels get 3 years of free full quality photo uploads and after the 3 years, any new photos uploaded from the phone are compressed. Existing photos do not get downgraded.

See the fine print at the bottom of these pages:

https://store.google.com/product/pixel_2

https://store.google.com/product/pixel_3

This is true, however, the first-generation Pixel is grandfathered into unlimited original-resolution photos for life.

Anecdotally, I was the early user of Picassa that was shut down and all my photos have been automatically migrated to Google Photos, so I would still give Google a benefit of the doubt. But recent stunts from them make it more and more difficult to trust them.