It is a method of calculating how much a hosting company can possibly charge you before you tell them to go fuck off. You are typically charged 95% of this amount.
its 320 GB, if you hold the 1 meg continuously (every second) in the month
formula is this 8 bits in a byte so .125x60 seconds x 60 minutes x 24 hours x 30 days
equals 324000 bytes or 324 gigabytes per month
Comment