Back on January 21, 2009 Obiden threatens 43 and all future (heirs) presidents over the Presidential Records Act/Archives and Executive Priviledge.
Directly after issuing continuous threats to former & future Presidents he has sealed Public Records pertaining to himself and placed his Attorney Generals (past and present) as road blocks preventing transparency.
An undisclosed number of documents remain in Chicago pertaining to Obama/Biden's Presidential Records/Archives and Executive Privilege, which to this date haven't been digitized or unsealed. January 21, 2017 + 5yrs=
https://ww.motherjones.com/politics/2009/01/obama-bush-i-can-release-your-records-dont-it-sue/