ST Microelectronics offers a diverse range of semiconductor and intelligence systems, including the STM32 line of microcontrollers. We’ve had a number of questions on STM32F407G-DISC1 recently concerning whether or not it ships with its necessary connection cabling, and if not whether a version of it exists which does.
This board does not ship with its necessary cable. According to the getting started guide, the product requires an A to Mini-B USB cable, or a C to Mini-USB if your system does not have A ports. Cables in a variety of lengths and styles matching the typical A to Mini-B configuration can be found from DigiKey here: A Male to Mini B Male USB Cables. There is unfortunately no version of this precise board that ships with its attendant cabling pre-supplied.