Interesting post by Prof. Alberto Bernabe. FWIW if there is no identifiable living person who would be harmed by the disclosure, I think that the old file can be donated to a library. A much harder case is that of, for example, about the files of the lawyers `cold war’ spies like Alger Hiss or the Rosenbergs for whom there are living heirs – who have explored, explained, and assessed their conduct . – gwc