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Open a TFTP server application on your computer and place the firmware rename file into the root TFTP folder.
Working with the V403R11 firmware involves several key aspects:
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This means the firmware is not compatible with your Hardware ID. Do not force the update.
Updating with the wrong file can permanently damage (brick) your device. Always verify the file matches your hardware model. How to Upgrade the Firmware on your Security DVR or NVR Open a TFTP server application on your computer
Most V403R11 builds are optimized for HiSilicon (Hi3520D, Hi3521A, Hi3536) chipsets. How to Download V403R11 Firmware
Log directly into your DVR/NVR local interface using a monitor and mouse. If you share with third parties, their policies apply
If your DVR/NVR is not booting up, you cannot log in. In this case, you may need to physically examine the device's motherboard:
Ensure the drive is formatted to FAT32. If the recorder still does not see the file, try a different USB port (preferably on the rear panel directly attached to the motherboard) or use a smaller USB drive (e.g., 4GB or 8GB). Device Is Bricked and Won't Read USB (TFTP Recovery Method)