For example: The actual capacity is the marked capacity of the hard disk 1000G / 1.024 / 1.024 / 1.024 = 931G (1000 ÷ 1.024 ÷ 1.024 ÷ 1.024), so the display capacity of a 1TB hard disk is 931G. Instructions for formatting hard drives for extended storage and operation.
eBay