Thank you for writing us.
Could you tell us the model number and firmare version of your DVR system?
And tell us why you want to upgrade the DVR.
If there is something wrong with the DVR, could you tell us more details?
Or you can also take some relevant pictures or videos for us to check.
After we confirm the information, we can provide detail steps to try and resolve your problem.
If you just want to upgrade the DVR to the latest version, after we confirm the model number and firmare version of your DVR system, we will tell you if there is a firmware upgrade on this model of DVR.
If you have any questions, please let me know.