The sole function of any surveillance system is the ability to capture and retain footage of the events that take place. Imagine all the times there never existed an instance to justify or the need for footage confirmation. Then the day comes when an occurrence takes place and you retreat back to your DVR to retrieve and review the footage. Imagine how insulting the feeling is to discover it wasn’t there. Weather your storage space was inadequate, a hard drive failed or a smart crook covered his tracks and took your recording device; this realization is nothing short of grim.