A "16MB" firmware file typically refers to the size of the flash memory on the DVR's motherboard, a common spec for many 8-channel units using HiSilicon SoCs. How to Find Your Firmware
Go to the DahuaWiki and use their Firmware Tool to type in your model number and get a direct download link. Download Firmware DVR 8CH DHUA 16MB rar
Installing the wrong firmware can "brick" your device, making it unusable. A "16MB" firmware file typically refers to the
Never unplug the DVR during the update process. It will reboot automatically once finished. Never unplug the DVR during the update process
If your device is connected to the internet, you may be able to enable Cloud Update via the mobile app iDMSS/gDMSS or the DVR menu to skip manual file handling.
Use the Dahua ConfigTool on a PC to find the device on your network and push the update remotely.
Once you have downloaded the file (often in a .rar or .zip format), extract it to get the .bin file. You can then update using these methods: