Matching the correct firmware is critical to avoid damaging the device. Follow these steps:
Navigate to Main Menu > Advanced > Upgrade . Select Local Upgrade . The system will scan the USB drive and display the V4.02.r11 file. Click Start or Upgrade . V4.02.r11 H.264 H.265 Dvr Nvr Firmware Download
: Some updates reset the system to factory settings. Try leaving the password blank or using standard defaults like admin or 12345 . Matching the correct firmware is critical to avoid