Unplug the power. Connect the USB cable to the box's USB OTG port (usually USB port #2, the one closest to the Ethernet port). Connect the other end to your PC.

The build ID specifically corresponds to Android 7.1.2 Nougat . While this software was originally developed for official Google devices like the Pixel and Nexus 6P, it has been widely adapted as a "stock" or "custom" firmware for generic Chinese TV boxes like the MXQ Pro 4K, V88, and Vinabox series. Hardware Specifications: The RK322x Platform

Once you have the stock firmware running, optimize it immediately.