The more frames per second (fps) you choose, the more network capacity each camera will require and the more data storage you’ll need. A single digital camera running 24 hours at just 5 fps creates 11GB of information per month for just one camera. A 500-camera system, not at all uncommon for corporate buildings and campuses, will generate 165 terabytes of data every month. The more pixels it will have, the larger the file will be and the bigger the file it will consume.”]
Source: https://www.csoonline.com/article/2120714/how-to-build-a-surveillance-camera-system.html