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Download and unzip the firmware. Ensure the file (often a .bin or .dav file) is saved to the root of the USB drive. Insert & Upgrade: Plug the USB into the DVR/NVR. Navigate to System > Upgrade (or Maintenance > Upgrade). Select the local upgrade file and click Start . v402r11 h264 h265 dvr nvr firmware download work

architectures like the Hi3520, Hi3521, or Hi3536. This firmware supports both : Provides a comprehensive list and guide for