The information supplied in Disk Usage seems to conflict with df -k I know top of graphic window sort of rectifies the information, but how does one interpret 100% ?
Disk Usage Analyser is splitting up the usage by file, not basing it on the entire disk.
So in this instance, 100% of disk = All the files (19.4 GB worth of them). Look deeper and it gets divided up:
-
/usr, takes 50% -
/home, takes 30% - etc…
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Thanks, I knew there had to be some explanation 
In other words the 100% = what is reported used by files - in this case 10% of dev/sda5
I think I’ll stay with the command line in this case