This addon board connects to a Raspberry Pi Zero (RPi0) or Zero W (Wireless) via pogo pins to provide a full sized, USB Type-A connector.
You can change Raspberry pi zero or Raspberry pi zero W as a U disk via P4wnP1 P4wnP1 project(https://github.com/mame82/P4wnP1), and you use it as BadUSB device also.
With this type of setup you can have a portable device to execute Responder (https://room362.com/post/2016/snagging-creds-from-locked-machines/)or PoisonTap(https://samy.pl/poisontap/) type attacks.
About the P4wnP1 project:
P4wnP1 is a highly customizable USB attack platform, based on a low cost Raspberry Pi Zero or Raspberry Pi Zero W (required for HID backdoor).
Length: 65 mm / 2.55 inch
Width: 30 mm / 1.18 inch
Thickness: 12 mm /0.047 inch
1 * Raspberry Pi Zero W USB-A Addon Board
4 * Screws
8 * Nuts