Snap Shop Capability has reached the Upper Limit!

So I added a 5th camera and get the message “The snapshot capability has reached the upper limit” Without me going through a lot of trial and error, meaning changing SNAPSHOTS Settings: Image Size, Quality & Interval, will changing/modifying settings will this allow me to add snapshot to 8 cameras or is the NVR limited to 4 cameras?

I got the message too when I tried on the 5th camera. it seems like the NVR unit is set to only 4 cameras.