Cloning Error Dialog Status 72

I get an error dialog when attempting to create an Image from a Volume.

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I have checked the external USB HD which is the destination for the Image file, using Disk Utility. No errors reported.

Am I unknowingly doing something wrong?

Can you look in the log for further details?

log show --style syslog --predicate 'process contains[cd] "Winclone"' --info --last 2d

(you can adjust the argument of "2d" from 2 days to other time periods that you want the log, like "10m" for the last 10 minutes or 3h for the last 3 hours).