Except Google Photos, which every couple days starts up telling me my phone is backing up (it isn't yet, not until I confirm it on the screen) and presenting an opt-out for uploading photos to Google. That's in Poland, EU, so I'm not sure how is that even legal. Next time, I'll ask my local DPA.
If you refuse to upload all your photos, Google Photos randomly sometimes pops up a second request to upload your 200 most recent photos instead.
I declined the first request that interrupted my task, then tried to select a photo to continue my work, but the "Yes" button for uploading recent photos appeared over top of the photo just as I clicked. Google Photos immediately began uploading my photos without my true consent.
