If they are important should not your character (ie you) be takinig manual actions to preserve them. Otherwise it is just like RL, if you don't file away important stuff you lose it.
Also it's nice to save some battle reports for posterity, but usually the battles occur in intense moments, when you don't really have time/attention to bother archiving, and by the time you do, they are gone.
The ability to manually archive reports is something I can support, much better then having a folder of copy/pasted notes and reports.
