Go to Menu > Maintenance > Upgrade .
Ensure the file is not inside a folder on the USB and has not been renamed.
Firmware is usually downloaded as a .zip . Unzip it and move the single firmware file (e.g., digicap.dav ) to the root directory of the USB. 2. The Update Process
If your DVR hangs on the splash screen, a full flash can restore the system.
Go to Main Menu > System > Information to see your current "Build Date" and "Software Version".
Full updates can sometimes add support for H.265+ compression or higher-resolution cameras. How to Find the Correct Firmware
Newer firmware often includes encryption for remote viewing and fixes for common vulnerabilities.