Wolfenstein: Youngblood boasts plenty of collectibles players can hunt down, including floppy disks that can hide codes to certain crates and doors. They're spread throughout every location, including Little Berlin.
There are four floppy disks to be found in Wolfenstein: Youngblood's Little Berlin district, one of which contains the codes to the Gestapo Crates in the area. You'll find it during or after the Lenz's Secret side mission on a table next to a stack of books and a computer.
Wolfenstein Youngblood Little Berlin Codes
There's another floppy disk to be found during the Lenz's Secret side mission as well, and it's required to progress it. It waits in his apartment, past a bookcase.
For the third floppy disk, you'll want to go to the alley next to the Ultravideo, enter the building and proceed to the top floor. Enter the room to the right and you'll find it on the edge of a desk.
The fourth floppy disk waits in a room flooded in red light on the top level of the Interrogation Center.
Wolfenstein: Youngblood is out now on PC, via Steam, Xbox One, PS4 and Nintendo Switch. It will arrive on Google Stadia at a later date.