The update should start automatically. A flashing red LED typically indicates the update is in progress.
: Once the camera reboots, the update is complete. Crucial : Delete the update file from the SD card afterwards to prevent the camera from trying to update every time it turns on. How to Update Official Firmware Viofo A119/S/Pro DashCam
: Copy the downloaded firmware file (usually a .bin file) to the root directory of the SD card—do not put it in a folder. Installation : Insert the SD card into the powered-off dash cam.
: Long-term users have reported over 4 years of "faultless" operation. However, some units may "freeze" or stop recording when the SD card reaches capacity, which is a common reason for seeking a firmware update.
: Records in HD with decent clarity for daylight driving. Some users report that it "writes well" and offers good build quality for the price.