Timeshift - Selected Timeshot device is not a system disk

[Fabby]

Sounds like you need this:

[HowTo] make a crash-proof backup in Manjaro for your entire system

Difficulty: ★★☆☆☆ If you follow the tutorial completely, you will be able to create a backup of your entire system not only limited to Manjaro, but also including Windows, RHEL, Ubuntu, … and whatever else you might have installed on your system! Even if you replace your HDD by an SSD, your HDD crashes, your entire system gets stolen, … you can always restore a Cold System backup to an identical system (You cannot restore E.G. a Dell XPS onto a Dell PowerEdge and then expect that to…

The tutorial uses borg for data backup, but you could still use Timeshift as a data backup tool, but not a single warm on-line Bacup program has the restore versatility of any cold off-line backup program and I’ve been restoring systems successfully for 30+ years now…