Use this method if the online option is unavailable or if you need a specific firmware version. How To Upgrade ANY CAR Android Stereo Software / Firmware
Updating this unit generally involves downloading specific firmware from the manufacturer and using a USB drive for a "Local Upgrade".
If you own a car head unit powered by the motherboard (commonly found in generic 2GB RAM/32GB ROM Android car stereos), you have likely encountered one frustrating truth: the factory software is often buggy, slow, or outdated.
High-quality community-made "SuperMods" and stock firmware for the are typically found on XDA Developers . Flashing via USB: Format a USB drive to FAT32.