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The Verge: Google might scan your photos for personalized ads
(www.theverge.com)
This is a most excellent place for technology news and articles.
Also, use Google takeout and the helper to keep meta and exif data intact, it will take hours and hours to run but it does a perfect job!
https://github.com/TheLastGimbus/GooglePhotosTakeoutHelper
I feel immich-go might be a better choice: https://github.com/simulot/immich-go