The full File is an item used during Rocking Out. It is created by filling the empty file with all 5 of the pirates' marks gathered during the quest. The empty file is given by the Customs Sergeant in Rimmington, who believes that you have filled it with a confession. The full file is then returned and is transported back to Rock Island Prison. It can can then be obtained at the prison by talking to the Locker Officer upstairs and asking for the file with your own name on it. The file can then be brought to Young Ralph in the prison to complete the quest.