One has to decide just how much video one wants to keep. That is totally up to you. In over two years of messing with cams, I have yet to try and find video that I no longer have stored.
With 23 cams recording 24/7 onto 3 x10TB drives, I get about 18-22 days of video depending on which drive you check. I would LIKE another week or two, but my machine is HDD maxed out and I am not going to swap the 10TB drives for 12TB drives and through them away. Maybe some day I will figure out a way to put in a fourth drive. But I do have more cams to install so there is an incentive for me to work this. Maybe get a bigger case?
With 23 cams recording 24/7 onto 3 x10TB drives, I get about 18-22 days of video depending on which drive you check. I would LIKE another week or two, but my machine is HDD maxed out and I am not going to swap the 10TB drives for 12TB drives and through them away. Maybe some day I will figure out a way to put in a fourth drive. But I do have more cams to install so there is an incentive for me to work this. Maybe get a bigger case?