Estimation storage calculation for MPEG4 models

Storage size per day = bitrate / 8 (byte) x 60 (seconds) x 60 (minutes) x 24 (hours) x number of channels

What is the storage size of a camera for a week with 2M bitrate?
Storage size
= 2M / 8 x 60 x 60 x 24 x 7 x 1
= 151200M
= 151.2G