I wonder whether if there is any easy way to know how big the hard drive I will need for recording with Blueiris. I have 16 cameras, 6 are 4MP and 10 are 740p. I have a 2TB hard drive, trying to record continuously x 5 days duration. It is warning me that it is already 1.96TB full. How do I calculate the hard drive size for 5 day worth of continuous recording with those 16 cameras? Thanks.