Why is the hard drive capacity displayed on the computer different from that marked on the hard drive?

This may be caused by the varying calculation methods used by hard drive manufacturers:

• 1. Computers perform calculations in binary, based on a system of 2^10 = 1024 so that 1,024B=1KB, 1,024KB=1MB, 1,024MB=1GB, and so on.

• 2. For convenience of production and calculation, hard drive manufacturers perform calculations in the standard decimal system, so 1,000B=1KB, 1,000KB=1MB, 1,000MB=1GB, and so on.

• 3. Calculated in this way, the capacity of a hard drive with a nominal capacity of 1T is actually about 931GB, 93GB less than the 1,024GB the computer might otherwise calculate.