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kopia
Cross-platform backup tool for Windows, macOS & Linux with fast, incremental backups, client-side end-to-end encryption, compression and data deduplication. CLI and GUI included.
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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.
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OpenMediaVault
openmediavault is the next generation network attached storage (NAS) solution based on Debian Linux. Thanks to the modular design of the framework it can be enhanced via plugins. openmediavault is primarily designed to be used in home environments or small home offices.
You could look for something like Kopia (https://kopia.io/) or rclone to sync folders (https://rclone.org/). See more ideas at https://www.vmwareblog.org/single-cloud-enough-secure-backups-5-cool-cross-cloud-solutions-consider/.
Also Syncthing information Syncthing Documentation: https://docs.syncthing.net/
Openmediavault (https://www.openmediavault.org/) is another good solution. It has web UI and you can bring plugins to it too.