God you'd hope that Amazon is using S3 versioning (they apparently use S3 as the backend storage, because, well, yeah, you would. https://aws.amazon.com/blogs/s

God you'd hope that Amazon is using S3 versioning (they apparently use S3 as the backend storage, because, well, yeah, you would. https://aws.amazon.com/blogs/storage/how-amazon-photos-uses-amazon-s3-intelligent-tiering-to-significantly-reduce-storage-costs/ https://aws.amazon.com/blogs/storage/how-amazon-photos-uses-... )