The binary units like GiB, TiB, are technically supposed to be Gibibytes and Tebibytes. Thought it was a bit silly when they first popped up but now I find them adorkably endearing, and a good way to disambiguate something that's often left vague at your expense.

In my experience, nobody actually says "Tebibytes" out loud; it's just that silly. In writing, when the precision is necessary, the abbreviation "TiB" does see some actual use.