I have H.264 Camera Surveillance that I would like to buy a harddrive for it. What kind of harddrive should I get? Manual book didnt tell me whats kind or size I should get. Maybe 1TB or 2TB ? All I know it need to have 1 SATA harddrive. Can I just buy a regular harddrive ? Or Harddrive that have program installed for recording ? Many thanks in advance.