: Plug the FAT32-formatted USB into the front or rear USB 2.0 port of the NVR.
: Ensure the downloaded .bin file is placed in the root directory of your USB drive (not inside any folders). Step-by-Step Installation Guide cpunr4k2161v2 firmware download top
Official firmware for CP Plus devices is typically distributed through their authorized service portals or technical support channels. To find the most recent "top" version: : Plug the FAT32-formatted USB into the front or rear USB 2