3-82. All staff sections and subordinate units should inspect their paper and electronic archives. The purpose of this inspection is to ensure that the unit has not inadvertently retained personal information on any civilian or civilian organization. In general, units should only retain operational records and documents related to expenditures. They should delete or destroy any information containing civilian names, phone numbers, addresses, or any other personal identifying information, even if acquired incidental to the mission (such as from an aircraft manifest). Information on U.S. persons not affiliated with the DOD contained in files, databases, and repositories is retained in accordance with disposition criteria in AR 25-400-2. Information about U.S. persons deleted from user electronic files, but remaining on servers or archived files, may remain until systems administrators purge or retire them in accordance with systems maintenance policies, AR 25-400-2, or Archivist of the United States disposition instructions. Commanders should ensure their subordinates who have taken any photographic images, audio, or video of U.S. persons during the operation purge their military and personal electronic devices of that sensitive information.