What does 120GB mean?

Question

Iron

I saw a 120 GB SSD, but like 120, isn't it 128, because the volume is the same power of 2. That is, 8 GB, 16,32,64,128, where did 120 come from?

Answer 1

Marketing 120 GB and programmer 120 GB are two different things.
Plus technical costs.
Read Wikipedia. Now even in limited tariffs they sell megabytes in which 1000 bytes, not 1024.

Answer 2

part of the disk is still a reserve for the relocation of broken cells.

Answer 3

The manufacturers wanted and made it at 120. There are no fundamental prohibitions on the creation of memory modules for 3, for example, bytes.

Answer 4

Usually 1Gb in the context of marketing is 1000,000,000 bytes, not a power of two. The actual size will always be slightly different.
Suppose poppies usually write 124gb, but what do we see:
Capacity : 120.1 GB (120,101,797,888 Bytes)

Answer 5

Here are a couple of related links:
https://www.synology.com/ru-ru/knowledgebase/faq/538
https://ru.wikipedia.org/wiki/%D0%94%D0%B2%D0%BE% D...