Not as much as you might expect! But for an exact answer it depends on which setting mode you are using. If your video quality is set to SD or 2MP/1080p, allow up to 400kbps per camera or recorder channel. If your video quality is set 4MP, allow up to 1200kbps per camera or recorder channel. Finally, if your video quality is set to Up to 8MP/4K, allow up to 1800kbps per camera or recorder channel. Our software is constantly measuring the available bandwidth on the network and will store video on the Cloud Adapter in poor network conditions or during network redundancy. The video files will then be sent to the cloud once the network conditions improve or the network is restored. There is a network speed test in the KIRZ app under Tools, this will test the local network and tell you how many cameras can be supported. If you need any further guidance on data requirements please contact us.