This upgrade file works for the ZG1864M cameras. 

You can find your camera's model number and the version on the IPC Channel Config. 

You can follow up the guide below to upgrade the ZG1864M Cameras :

1) You needn't open the upgrade file, please directly download the upgrade files and save them to your U-disk.  And your usb can be regonised from the nvr.

(Please save the upgrade file V4.3.0.V82001450FA.img (For cameras)in the root directory, not save it under any other folders.)

Note: to perform this process, you will want to use a USB 2.0 drive ideally 16 GB or less in size, formatted in FAT32.

Some customers have reported issues when downloading this file using the "Microsoft Edge" browser.

If the file was downloaded using the Microsoft Edge browser, this will cause the file to be converted to a text file, which can't be read by the NVR. We recommend using a different browser for this process.

If you're unfamiliar with how to format a USB in FAT32, this video provides the steps: 

2) The file's name must remain exactly as listed in the article for the NVR to recognize it as an update.

It should be, if the file name is V4.3.0.V82001450FA.img changed to V4.3.0.V82001450FA.img (1), the upgrade will be failed.

3) Please go to main menu - IPC Channel Configuration - Select the camera to be upgraded and click Upgrade. Please select "Local Upgrade" and click start Upgrade and wait for the automatic upgrade. You can see the messages pop up "succeed".

If the upgrade is successful, please go back to the IPC Channel Config, check if the firmware version have changed.

If the upgrade is failed, we suggest you change another U-disk or USB port to try.

Please let us know if you have any questions.