Firmware updates often reset the NVR to factory defaults. Be prepared to re-enter your network settings and camera passwords. Where to Find the Exclusive Firmware?
This usually means the firmware version is incompatible with your specific hardware revision. k8204w firmware exclusive
Check the sticker on the bottom of your NVR or the "System Info" tab in your menu. Ensure the firmware you've downloaded matches your and Hardware Version . Applying firmware for a different chip (e.g., HiSilicon vs. Fullhan) will cause a failure. Step 2: Prepare the USB Drive Firmware updates often reset the NVR to factory defaults