Here's something I noticed recently: I still have a shoebox from a pair of shoes I wore in college. It has SS on the side of it, which stands for "secret stuff."
Yes, it's a box filled with letters, newspaper clips, photos and other stuff from the end of high school through my college years, when my wife and I were dating. A lot of it is letters and other stuff we sent each other our freshman year, when we went to different schools before both transferring to the University of Iowa.
My wife tossed whatever similar artifacts she had kept years and years ago. When we moved in September 2021, she saw I still had the secret stuff box and was like, "You really need to dump that. Do you want our kids to go through it someday?" Of course, looking through it all turned into a flood of memories and I ended up stuffing everything back in the box and keeping it.
The photos -- at least the decent ones -- will be saved, and I have already showed our now-adult children some of them. By "decent" I mean in focus and worth keeping -- you forget how bad cameras used to be. There weren't any dirty photos taken, but some of the letters? Yeah, probably should dump 'em.