Generally refers to a flash-based USB drive, but may refer to a USB-based device that performs some other function such as a wireless adapter or authentication token. See USB drive and USB dongle.
"USB stick." YourDictionary, n.d. Web. 16 August 2018. <http://www.yourdictionary.com/usb-stick>.
USB stick. (n.d.). Retrieved August 16th, 2018, from http://www.yourdictionary.com/usb-stick