Are you really ignorant if the basic facts?
- it may be possible that Trump was initially unaware or lazy. But during around one year, the NARA recalled him he has no right to keep them and that he must give them back,
- when finally agreed to give them back, he hid some documents and lied about it. He was certainly not lazy to select the documents he wanted to keep, ask his aides to hide them, and instruct his lawyer to lie about it.