Key information
Many users notice that a 1TB SSD or flash drive displays significantly less capacity, often around 930 GB, when connected to a computer. This discrepancy frequently leads to concerns regarding product authenticity, though it is a standard technical occurrence rather than a manufacturing defect.
The primary cause is a fundamental difference in mathematical systems. Manufacturers utilize the decimal system, where 1 Terabyte equals 1,000,000,000,000 bytes. Conversely, operating systems like Windows operate on a binary system, calculating 1 Kilobyte as 1,024 bytes.
Due to this binary conversion, the manufacturer's 1,000,000,000,000 bytes are divided by 1,024 three times, resulting in approximately 931.32 GiB. Windows displays this value as GB, causing the reported capacity to shrink further as the total storage size increases, such as a 2TB drive appearing as 1.86TB.
Beyond mathematical differences, formatting a drive to systems like NTFS or exFAT reserves space for metadata and master file tables. Additionally, pre-built systems often include hidden recovery partitions, further reducing the available user space on the storage media.
