President’s term
On January 20th at the end of the President’s final term, the Presidential records of the Administration are automatically transferred to the legal custody of the Archivist of the United States and the National Archives and Records Administration. The records are eventually housed in a Presidential Library maintained by NARA. The National Archives and Records Administration preserves, reviews, arranges, describes, and makes available these records in its role as legal custodian.”
https://www.archives.gov/files/guidance-on-presidential-records-from-the-national-archives-and-records-administration-2020.pdf