Avoid random file-sharing sites. Use these trusted sources:

Once you have downloaded the firmware, extract the files to the of your USB drive. Do not put them in a folder; the head unit needs to see the boot files immediately upon scanning the drive. 3. The Flashing Process

Copy the firmware file (often with a .bin or .fw9 extension) to the root of a formatted FAT32 USB drive or SD card. Insert the media into the head unit.