> but the whole SSD capacity shown by Windows is 930GB.
Because the OS shows you drive capacity in power of two units, while the drive manufacturers advertise drive capacity in power of ten units. And the small difference in size between the two units adds up as the size of the drive grows.
A power of ten 1T size drive is about 930GB of space when measured using power of two units. Hard drive manufacturers have been using power of ten units for advertising capacity for about 25 years now.
Because the OS shows you drive capacity in power of two units, while the drive manufacturers advertise drive capacity in power of ten units. And the small difference in size between the two units adds up as the size of the drive grows.
A power of ten 1T size drive is about 930GB of space when measured using power of two units. Hard drive manufacturers have been using power of ten units for advertising capacity for about 25 years now.