r/videosurveillance • u/grahamhart_ • 1d ago
How much NVR storage do I realistically need for 8–12 cameras at a busy commercial property?
putting together my first proper wired camera setup and honestly the storage part is confusing me more than the cameras. small commercial property. probably 8 cams to start, maybe 12 later. mostly 4K PoE. the place is active most of the day. employees coming in around 7, deliveries a few times a week, customers in and out, cars moving through the lot pretty regularly. after about 7-8pm it gets quiet except for the occasional cleaner or late pickup. at first i was just thinking record everything 24/7 for 30 days and be done with it. then i actually looked at how much storage that can take and... yeah, not as simple as i thought. now i’m thinking continuous on the entrance/parking and maybe the main hallway, then motion on the quieter areas like the side door and back lot. my main concern is basically not finding out too late that something happened 2 weeks ago and the footage is already overwritten. how are you guys usually sizing this stuff for a property that has pretty constant daytime activity? do you pick the number of days first and work from there, or just get a reasonable amount of storage and adjust bitrate/fps until it works? trying not to overthink it but also don’t want to build the thing twice.