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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.
I use Filebrowser. Never tried with 20 GB but it shouldn't be a limit.
I used this WebDAV server for a quick test on a small file: https://github.com/mar10/wsgidav
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