I'm working on a backup server for home using R Pi.

My take-on with the ARM server and R Pi is

A low-power space-saving backup server with Fedora ARM server 35
Central access of files wherever
Data loss prevention of creative work: A simple 3-2-1 backup strategy at home

Security controls

Test scenarios & reporting

Cockpit

With imagination and budget, this could scale out to a high-performance backup server for your home lab.