: Plug the drive into the head unit's USB port. Most systems will detect the update automatically and prompt you to start. If not, you may need to enter the "System Settings" and select "Local Update."
Do you have the or MCU string from your head unit's settings to confirm this is the right file for your specific device? GF200821-TRL-1.2-GG.rar
: Ensure your car engine is running or connected to a stable power source to prevent the unit from shutting down during the 5–15 minute installation. Important Safety Note : Plug the drive into the head unit's USB port
: Unzip the .rar file and copy the contents (usually files like update.img or a folder named FYT ) directly to the root of the USB drive. GF200821-TRL-1.2-GG.rar