Finding the right balance between video quality and network bandwidth and storage capacity can be one of the biggest challenges of using IP cameras.
Bandwidth :
Bandwidth is the amount of data that can be transmitted in a fixed amount of time. For digital devices, the bandwidth is usually expressed in bits per second(bps) or bytes per second.
Storage capacity :
A video image captured by an HD IP camera is roughly four times the size of an image captured by an analog camera. That means it requires four times the bandwidth and storage capacity
Maximum storage capacity of NVR and DVR varies acoording to model and size.
Bit rate
Bit rate is closer to bandwidth, but it is often per host, or source to destination devices.
Setting high frame rates and bit rates on your cameras can give you clear video, but it can also quickly eat up storage space and even clog your network.
Setting rates too low could result in poor quality video but you will get more storage space.
Network setup
With proper network and video settings can resolve all the issues and helps to provide high resolution picture with enough storage space , without overloading the network.