The. X-LIN 4-16/20 IPTV is a 4 channel live steaming IPTV server. But it also has the capability of up to an additional 16 channels of IPTV [ based on Bandwidth size] from the file section of the hard drive bays ! The additional 16 IPTV channels work the same as the Live ones as there is a URL also created when the Encoder is Published. But the content must be stored on the hard drives in the unit ! We only supply the machine with built in 1TB HD. But it has an additional space for 4 of the 2 Terri bite HD if desired at additional costs. www.hotware.asia info@hotware.asia