For reference, the Clinton Socks case refers to:

The case Farrell is referring to is titled Judicial Watch v. National Archives and Records Administration – also known as the “Clinton sock drawer” case. Former President Bill Clinton created White House audio tapes with historian Taylor Branch and stored them in his sock drawer. Judicial Watch sued to obtain access to the tapes and lost.

“He took them from the White House with him into private life,” said Farrell. “There’s classified material on those tapes and arguably it’s the sort of running stream of consciousness record of Bill Clinton’s presidency. Pretty important stuff.”

The Presidential Records Acts (I think these are the relevant parts?):

Places the responsibility for the custody and management of incumbent Presidential records with the President.

Requires that the President and his staff take all practical steps to file personal records separately from Presidential records.

Establishes in law that any incumbent Presidential records (whether textual or electronic) held on courtesy storage by the Archivist remain in the exclusive legal custody of the President and that any request or order for access to such records must be made to the President, not NARA.