Whether you need to transfer media files to the Raspberry Pi or you want to use the raspberry as a simple Network-Attached Storage (NAS) device, this guide will show you how to enable file sharing of a folder on the Raspberry Pi running the Raspbian OS. Prerequisites & Equipment. You are going to need the following: A Raspberry Pi Amazon.com: Geekworm Raspberry Pi 3 B+ (B Plus)/3B mSATA SSD Storage Expansion Board, X850 V3.1 USB3.0 Mobile Hard Disk Module for Raspberry Pi 3 Model B+/ 3 Model B/ ROCK64: Computers & Accessories The Raspberry Pi Zero Wireless extends the Pi Zero family. The Raspberry Pi Zero is half the size of a Model A+, with twice the utility. A tiny Raspberry Pi thats affordable enough for any project! The Pi Zero Wireless has all the functionality of the original Pi Zero but with added wireless connectivity. Format your USB flash drive to work with Raspberry Pi 2. Create the RetroPie folder 3. Create the ROM folder structure 4. Unzip and add your ROMs 5. Transfer your ROMs to your Raspberry Pi 6. Restart Emulation Station The Pi would not see the USB device when I ran 'lsusb'. [The same USB device worked just fine on a Raspberry Pi 3b]. I purchased this hub, connected it to the Pi Zero W and my connectivity issue was resolved. It's a great fix for an annoying USB issue on the Pi Zero W. Background: The Pi Zero/Zero W can be either a USB host or a USB device.