The FBI’s search of former U.S. President Donald Trump’s Florida club and residence last month turned up 48 empty folders marked as containing classified information, a newly disclosed court filing shows, raising the question of whether the government had fully recovered the documents or any remain missing.

The filing, a detailed list of items retrieved in the search, was unsealed Friday as part of the court fight over whether to appoint an independent arbiter to review the materials taken by federal agents when they descended on Trump’s estate, Mar-a-Lago, on Aug. 8.

Along with the empty folders with classified markings, the FBI discovered 40 more empty folders that said they contained sensitive documents the user should "return to staff secretary/military aide,” according to the inventory. It also said that agents found seven documents marked as "top secret” in Trump’s office and 11 more in a storage room.