So, I've created a SQL Server Agent job, according to the answer to my prev question:
running nightly (at 2:11) according to the schedule:
There are 9 .bak files in 3 subdirectory of d:\backup\ source folder, 3 old bakup files are being deleted and 3 new is being created by another preceding SQL Server Agent job.
The described here job copy-purges files but... what the heck the history of this
Copy&Purge BAKs SQL ServerAgent job shows 96 items:
How to make it less verbose?
Eventvwr.msc doesn't contain any eroors for the corresponding period of time (of job run).
So, I've made these changes
and it seems it simply truncates a per-job log: