KDE Plasma 5.22.4 on Arch
System Monitor's Overview is not displaying the data for my primary disk. How to choose the disk to be displayed?

I think it is showing the total usage of all mounted disks - roughly, what the "df --total" command shows. I can see this if I mount an external backup drive that is normally not mounted, then restart System Monitor. The Overview tab Disk usage has changed.

Section_8 wrote:I think it is showing the total usage of all mounted disks - roughly, what the "df --total" command shows. I can see this if I mount an external backup drive that is normally not mounted, then restart System Monitor. The Overview tab Disk usage has changed.

Yes. This is right.
But can I change the behavior, so it will show only the primary disk?