A:Answer This particular camera by itself doesn't have an SD card it records to, so your questions are really going to depend on the amount of GB on your own hard drive and computer. You should be able to choose in whatever recording software you use to overwrite the hard drive or not, once it fills up. One camera would approximately take a month to fill up a 500GB hard drive. The length of time to keep data, again, would be your own choice and what recording parameters you've set up on your own PC.