Space on SD Card - big differences

[StewartM]

You are spot on. I appreciate the update.

 

[mcrippa]

Update:

• "drop the I-Frame interval to match (or go below) the camera's frame rate" as discussed the I-Frame interval is automatically managed by the camera. I cannot change it. Anyway the camera chosed to set it at 15. I'm recording at 12 frames per second, so we are not too far from your suggestions.
• "experiment with thedigital noise reduction setting. Drop it to 20 from the default 50 setting and monitor the change.". I run this test but nothing has changed in a significant way (still a lot of disc consumption)

Considering I was not making any progess, I decided to move from 3840x2160 down to 1920x1080P. Surprise-surprise, alla the cameras are using the same amount of space (8GB per day). The next step is to revert back to 4k and check what happens with 4k. Please note I didn't change the firmware version.