You can find commercial USB sticks that can also connect via WiFi. But [Neutrino] made his own using an ESP8266 married to a card reader ... go buy a SanDisk Connect Wireless or similar product ...

The wireless version of the universal serial bus (USB). Using ultra-wideband (UWB) technology, wireless USB is used to transmit the content of a laptop screen to a TV set or to a USB device that ...