Initially, your FortiRecorder appliance will store video data on its internal hard disk drive. By default, it will continue to do so, regardless of the video clip’s age, until all available space is consumed. By storing files locally first, your FortiRecorder appliance’s system resources are not continuously consumed by transferring video that may not be needed, nor by transferring them while it is recording (which is itself bandwidth-intensive). But on a per-camera basis, you can configure your FortiRecorder appliance to either delete old videos, or to move older videos to an external location.