The Baofeng UV-21 V2 is programmed using a USB to Audio/Mic cable. The cable that is included with the radios usually has a Prolific chip, but could be FTDI/ WCH or another make. To program the radio software called Chirp is used, this is a free download. Please note that the USB C type port is only for charging, this isn't a data port unfortunately.
Additional Drivers:
