There is no reason why presidents and senators should treat official documents filed in their offices as their personal property. The Presidential Records Act, for example, allows a president to not only conceal material but appoint his own loyalists to make critical decisions on whether and when material can be reviewed. Presidents can unilaterally declare matter as privilege and nonpublic to protect themselves from embarrassment and the judgment of history.
This is wrong. Those personnel records from Biden’s public service are public records, not his.