The Raspberry Pi 0 can emulate a device as was suggested, but also there are add on boards that can provide wireless connectivity through the bus instead of USB

The Raspberry Pi 0 can emulate a device as was suggested, but also there are add on boards that can provide wireless connectivity through the bus instead of USB. Both Adafruit and Hackaday have quite a bit of information. Examples: http://hackaday.com/2016/10/24/raspberry-pi-zero-as-a-usb-stick/ http://hackaday.com/2016/10/24/raspberry-pi-zero-as-a-usb-st... https://redbear.cc/product/rpi/iot-phat.html https://redbear.cc/product/rpi/iot-phat.html http://hackaday.com/?s=usb+picture+frame http://hackaday.com/?s=usb+picture+frame https://hackaday.io/project/8678-rpi-wifi https://hackaday.io/project/8678-rpi-wifi