You are likely trying to install the wrong firmware version. Re-verify your model number.
Use a reliable USB flash drive with a capacity of 32GB or smaller. dvr-g608l-n firmware update
Adds support for newer ONVIF profiles.
DVR / NVR - How to manually upgrade the firmware of your recorder You are likely trying to install the wrong firmware version
Видеонаблюдение в Сергиевом Посаде 1. Identify Your System Version dvr-g608l-n firmware update
: If the DVR doesn't recognize the file, ensure the filename has not been changed and that the USB drive is definitely FAT32.