The Disk Calculator app can be used to calculate the recording disk space

The Disk Calculator app can be used to calculate the recording time when the disk space is given and calculate the disk space when the recording time is given. In the app, you are also allowed to configure the device parameters including device type, video standard and channel number, and the channel parameters including image quality, resolution, frame rate and bit rate. The app displays the recommended bit rate after resolution and frame rate are selected for the configuration