An NVR makes it easy to record video surveillance footage, but you will need connected hard drives on which to store this footage. Choosing the right amount of storage for your surveillance camera installation can seem like a confusing gamble, but it doesn’t have to be; it’s simply a matter of calculating the length of video you need to store, by the bitrate and resolution your camera shoots at. When recording 4k security camera video, this can end up being a large number requiring terabytes of footage. For lesser archival needs, you can usually get away with much less.