If it were me, I would not print nor purge the posting journals prior to running Period End. Yes, I realize there is a warning, but it is just a warning. I prefer having them stored with the data rather than having to refer to printouts should I need them.
Year End is a different story. Then you have to print and purge them (but I would print them to a pdf file, not to paper).
Why didn't you start a new topic for this question? You "hijacked" the original topic. Not that I mind, but it's not polite to the original poster.
Steve