Your family lives in Egypt by the river called "denial"!
They won't ever understand, not ever, so don't try, it will only cause you more harm.
I think PTSD memories aren't exactly stored at all, but due to brain chemicals they are strewn all over the floor of our file room! The good news is that once we teach the brain where a particular type of trauma memory goes, (work through it) it will then find all similar ones and file them away properly also! You won't have to go through each and every situation that was traumatic.