If you're a rational, prudent person and your predecessor is charged with holding onto top secret papers and refusing to return them, it should occur to you, if I'd been in a place where those documents came your way, to check your own files and see if any got left behind. It sounds like this is what happened.

If Bush or Carter or Clinton or anyone else has old documents like this they returned them quietly or they're so old to be harmless now. Hillary was put through the ringer over her private email server and was found to be without malice and no charges filed. That would be the reasonable outcome with any of these others, and the sooner it is taken care of, the better.

Trump is in his own toxic case a souvenir collector and I bet if you checked the phones of his visitors to the White House or Mar-a-Lago that you'll find they snapped a few photos of those documents Trump was waving around.