You're FOS.Except that it is perfectly legal for ex-presidents to have copies of any classified docs they want.
All they have to do is give themselves copies when president.
And all presidents do just that.
It is ex-presidents who run presidential libraries, write memoirs, etc., not NARA.
NARA is totally subservient to an ex-president and does what the ex-president wants.
Classified documents or ANY documents of the president have to be approved by NARA and depending on the subject matter, the department that the document involves.
ONCE it is approved, and declassified, THEN, the president can display it in his library.