The president is special
All the Deep State had to do was visit the location without a warrant and pick up the boxes
But if they did that that could not have snooped through the First lady’s bedroom
Trump is very ignorant. Most of the documents were marked top secret or confidential. There's no security at Mara Lago. None of the documents belong to Trump. Of course Trump claims they are his... forget the Presidential Records Act.
Jared Kushner probably turned him in.
You could hide documents in your wife's closet if you are a real sneak thief.