power off the unit or remove the USB until you see a prompt saying "Please remove update device". Pro Tips for a Better Update Experience Folder Fix
If you own a budget-friendly Android head unit, chances are you’re running the platform. While these units offer incredible value, the factory software is often notorious for "lag," "app crashes," and "limited customization." yt9213aj firmware update better
: Go to Settings > System Info and note your current ROM name and MCU version. power off the unit or remove the USB