Because these units are manufactured by various factories (GongYue, XYAuto, etc.), there isn't one "official" website. However, several community-driven hubs host these files for free:
Many YT9260 units will detect the file upon boot-up and ask if you want to update.
The process usually takes 5–10 minutes. The unit will reboot several times. Do not touch the screen or pull the USB out until you see the Android home screen. Troubleshooting Common Issues
Plug the drive into the 4-pin or 6-pin USB port at the back of the head unit. Trigger the Update:
While some files require a premium account, many older board firmwares are available for free.