✅ (power failure during update can brick the device)
✅ (printed on the mainboard sticker or visible in system info) dh-xvr4a08 firmware download
✅ Menu → Maintenance → Backup & Reset → Export Config ✅ (power failure during update can brick the
A: You likely have a custom OEM version (e.g., LTS, Amcrest, Lorex). Contact that brand for their specific firmware. dh-xvr4a08 firmware download
A: No, the video database remains intact. Configuration may reset to defaults.