Personally, I use FreeFileSync to back up my data files, both Linux-specific and shared, to an external device. On the system side I use TimeShift to auto make daily snapshots of / and /home (which reside on different partitions) just in case, and every couple of weeks or so, Macrium Reflect to make offline images of the / and /home partitions.
It may sound a lot but it all takes very little time to do.
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