Dahua 16 Channel DVR-DH-XVR1B16-I, 1080p

Hard Drive Support: The DVR has 1 SATA HDD bay. The actual storage capacity is determined by the size of the hard drive you install. Common HDD Sizes: It typically supports large-capacity drives, commonly up to 6TB or 10TB (check the spec sheet for the maximum supported size). What Determines Usage: Number of Cameras: Recording 16 cameras uses more storage than recording 8. Recording Resolution: 1080p uses more space than 720p. Frame Rate (FPS): Higher FPS (e.g., 30 fps) uses more space than lower FPS (e.g., 15 fps). Recording Mode: Continuous recording uses the most space. Using motion-activated recording can drastically reduce storage usage. Video Compression: The type of compression (e.g., H.264, H.265) is critical. H.265 can reduce file sizes by about 50% compared to H.264, effectively doubling your recording duration.