Insert a USB stick (formatted to FAT32) into a spare port on your PC or Mac. Create a folder on the stick called “retropie” (without the quotation marks). Remove the stick from your computer. Insert the stick into one of the spare ports on your Raspberry Pi and wait for a while. This is because Retropie is creating the correct folder system on the stick that it needs to recognise ROMs. Remove it from the Raspberry Pi. Insert it back into your computer’s USB port and you’ll see that there are are folders for all the major different console and computer types inside “retropie/roms/”. Just add the relevant ROMs into the respective console or computer folder. Unplug the stick from your computer and plug it back into your Raspberry Pi. You’ll need to wait for the Pi to recognise all of the ROMs and it can take quite a while depending on how many you have. Refresh EmulationStation by hitting “F4” on your keyboard or through the start menu. The games should be available under the logo for each console or computer. Bingo.
