Also known as Hard Disk Drive, it is a device that would store files like documents or in our case video recorded files as a digital file.

Known as Redundant Array of Independent Disks, a technology that is used to increase the performance and/or reliability of data storage.

Termed as File transfer protocol, it is a network protocol for transfering files from one point to another over the TCP based network, ie: the internet.

It is to allow the NVR/DVR to work more efficently by steaming one access feed and letting the Router device distribute the video feed to multiple devices.

a file-level access storage architecture with storage elements attached directly to a LAN. For more information, click this.