⚠️ A power loss will corrupt the firmware and may render the unit inoperable. ⚠️ Do not unplug the USB drive or disconnect the network while the update is in progress. ⚠️ Back up your current configuration (if possible) before updating. Settings may reset to default after a major firmware change. ⚠️ Verify the firmware version – Installing the wrong firmware for a different hardware revision can brick the device.

If you upgrade your hard drive to a larger capacity or replace an old analog camera with a newer model, a firmware update ensures the DVR recognizes and works with the hardware.

After a , your system may have reset certain user preferences. Don’t panic. Perform this checklist:

Click to select the firmware file from your computer and click Upgrade . Critical Safety Warnings

Updating the firmware involves identifying your specific hardware version and performing a manual upgrade via USB or a web interface. Since this model is often part of a generic series based on Hisilicon SoC (like the Hi3520 or Hi3521), getting the exact file is critical. 1. Identify Your Current Version