There are two primary methods to update the firmware on the DH-XVR1B16H:

Transfer the downloaded firmware file (e.g., General_XVR1B16H-I_Eng_N_V4.001...bin ) to your USB drive. Connect to XVR: Plug the USB drive into the Dahua XVR. Access Menu: Go to Main Menu > System > Upgrade .

Click Start or Upgrade . A progress bar will appear.

The safest way to get is through the Dahua Technology official product page. Go to the Dahua Support Center . Search for "XVR1B16H-I" or your specific model number. Navigate to the "Download" or "Firmware" section. 2. Dahua Wiki

If you have trouble finding the exact file, I can try to help you locate the latest version if you provide the current you are running. Firmware Update - Dahua Wiki