For investigation purposes I started an experiment (on a 64bit Win 7 system):
I installed WSUS v10.9.2 in a first test folder and let it download all packages WITH enabled security-only option.
Secondly I installed another WSUS v10.9.2 and let it download all packages WITHOUT enabled security-only option (=full rollups).
Afterwards I compared the two directory trees.
Much to my surprise there were 4 more files on the security-only tree:
All of them are Security Packages for Win 7 (from years 2014 and 2016).
I wonder why they are NOT retrieved in full rollup instance?
From my point of view a full-rollup download should download everything from security-only PLUS the last additional rollup package.
So why are in full rollup dir tree the security packages missing?