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gphotos-cdp
This program uses the Chrome DevTools Protocol to drive a Chrome session that downloads your photos stored in Google Photos.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
As others have said Google Photos backup via RClone has some caveats, mainly not downloading at original quality. Google Takeout does solve this but but in weird hierarchies.
I stumbled on a new project which simulates a browser download using a headless Chrome Developer tools session[0]. Looks interesting, supports continuation and can be ran on a cron job. Worth a look.
[0] https://github.com/perkeep/gphotos-cdp
Also, see Jake Wharton's Docker GPhotos Sync [0] for a containerized version of this tool. Unfortunately, this method seems to be the easiest way to automate a backup at full quality.
[0] https://github.com/JakeWharton/docker-gphotos-sync