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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.
PiBox - CM4 with proper 2xSATA (for which you might have to wait a few months)
I keep sensitive files end to end encrypted with Cryptomator, which works on both desktops and mobile devices, and everything else is just uploaded raw.
NOTE:
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Hence, a higher number means a more popular project.