[cableguymn]

1024 bytes = 1 KB
1024 KB = 1 MB
1024 MB = 1 GB
1024 GB = 1 TB (TERABYTE).

[Greysard]

As I said, “128 GB == 1 Tb” and the article is correct on all accounts. The lowercase ‘b’ denotes bits, and uppercase ‘B’ denotes bytes. One byte contains 8 bits. 128 GB * 8 == 1024 Gb == 1 Tb.