This topic describes how to calculate pay-as-you-go charges incurred for NAS.
Charges are incurred for the maximum used space of a file system within an hour and deducted from the balance at the next hourly interval. For example, if you receive a bill at 9:30, the bill includes the expenses from 8:00 to 9:00. The basic billing unit is one hour. Each expense is paid by the hour even if the usage time of a file system is less than one hour.
Maximum used space of a file system within an hour × unit price by the hour