Your Navori Stix 3700 comes with a single on-board USB slot which allows you to directly connect USB Media and USB input devices. However many customers want to simultaneously connect multiple USB devices to a Stix 3700, such as when they have a wired USB mouse and separate wired USB keyboard, or in the case where they want to simultaneously connect a wireless keyboard/mouse combo dongle in addition to a USB storage device.
The Navori Stix 3700 comes with a micro-USB to USB cable which can plug in to the micro-USB port of the Stix. The micro-USB port on the Stix 3700 is located between the USB-C power port and the SD slot on the side of the Stix 3700.