11. FIRMWARE UPGRADE : Used to upgrade most recent Firmware.
Note : The name of the Firmware Upgrade File is "dht_dvr4.bin".
NEVER Power off or disconnect during this process.
If the power is off during the process of firmware upgrade, the products could have
serious damage and could not work.
Note : If the USB Memory is not recognized or not working properly, please try
after formatting the USB Memory.
12. EXIT - Exits the MENU mode.
Once you choose this menu, the system will ask you once again whether
you will be proceeding he Upgrade process.
Connect the USB Memory with the FIRMWARE to be upgraded and click
"YES".
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