500GB 4 Channel D1 (7.5 FPS) BEST 11.5 Hours D1 (7.5 FPS) MEDIUM 15 Hours D1 (7.5 FPS) NORMAL 22.5 Hours D1 (30 FPS) HIGHEST (QT) 6 Hours D1 (30 FPS) MEDIUM (QT) 12 Hours D1 (30 FPS) LOWEST (QT) 22.5 Hours CIF (30 FPS) BEST 15 Hours CIF (30 FPS) MEDIUM 21.5 Hours CIF (30 FPS) NORMAL 27.5 Hours 8 CHANNEL D1 (7.5 FPS) BEST 7.5 Hours D1 (7.5 FPS) ...