Do not download random "Universal" updates from Facebook groups. The "S" model has specific hardware variants (e.g., S8, S2, or Pro). Installing the wrong MCU (Microcontroller Unit) update will permanently mute your sound or invert your backup camera.
Before downloading any files, you must confirm your exact hardware version to avoid "bricking" the unit. Navigate to A-media Auto -1024x600 S- Software Update
Extract the downloaded RAR/7Z file. Copy the update_auto.zip directly to the root of the USB. Do not put it inside a folder. Do not download random "Universal" updates from Facebook