Binary vs Decimal File Sizes — MB, MiB, and Marketing TB

Storage vendors advertise decimal terabytes (1,000,000,000,000 bytes). Many operating systems historically displayed binary gibibytes (1024³ bytes) — labeled sloppily as “GB”.

Why the drive looks “missing”

It is mostly label math, not defective capacity — plus firmware reserves and formatting overhead.

Convert precisely with the File Size Converter and learn the vocabulary in What Is Binary?.