Never turn off your car or disconnect power during the update process. A power cut can permanently damage the processor's flash memory.
Maintaining the correct firmware version on your head unit is critical for several reasons: Ums512-1h10-natv Firmware
Plug the USB into the head unit's primary USB port. The system should automatically detect the files and prompt for an update. Never turn off your car or disconnect power
Use a high-quality USB stick (preferably 32GB or less) and format it to FAT32 on a Windows PC. Ums512-1h10-natv Firmware
Updating these units usually follows a manual process via a USB drive.