it's the theoretical value The capacity of storage space should be calculated according to the days, bit rate and type 1. Bit rate: 2Mb (for example) channel and time Disk space   required 1 channel for 1   hour 2048Kb/8Byte*3600sec*=921600KB=900MB 1 channel for 1   day 900MB*24=21600MB≈21.09GB 1 channel for 30   days 21.09GB*30≈632.81GB 16 channel for   30days 632.81GB*16≈10125GB≈9.89TB 1. Bit rate: 4Mb (for example) channel and time Disk space   required 1 channel for 1   hour 4096Kb/8Byte*3600sec*=1843200KB=1800MB 1 channel for 1   day 1800MB*24=43200MB≈42.19GB 1 channel for 30   days 42.19GB*30≈1265.7GB 16 channel for   30days 1265.7GB*16≈20251.2GB≈19.78TB 2. Bit rate: 6Mb (for example) channel and time Disk space   required 1 channel for 1   hour 6144Kb/8Byte*3600sec*=921600KB=2700MB 1 channel for 1   day 2700MB*24=64800MB≈63.28GB 1 channel for 30   days 63.28GB*30≈1898.43GB 16 channel for 30days 1898.43GB*16≈30375GB≈29.66TB Note: these tables are only for reference, and the actual values have redundant.