The File Manager's Key is an event item in Arknights.
- A key that can open the underground gate of the Wall of Champions exhibit hall, unlocking some additional information.
- The file manager in the darkness has another duty: to cleverly let "secrets" be found by those in the know. The Adeptus Sprawiedliwi have never given up their control of Kazimierz–whether good or ill.
A key carried by the Adeptus Sprawiedliwi Kazimierz's file manager which allows access to the Wall of Champions hall of fame, having the File Manager's Key will allow the player to access NL-S-2.
The File Manager's Key are awarded from the Prestige system in Near Light, specifically by raising the player's Prestige level with the Adeptus to Appreciated.