Toshiba CANVIO BASICS series User Manual page 10

CANVIO BASICS
Windows is a registered trademark of Microsoft Corporation in the United
States and other countries.
One Gigabyte (1GB) means 10 9 = 1,000,000,000 bytes and one Terabyte
(1TB) means 10 =1,000,000,000,000 bytes using powers of 10. A
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computer operating system, however, reports storage capacity using
powers of 2 for the definition of 1GB = 2 30 =1,073,741,824 bytes and 1TB =
2 = 1,099,511,627,776 bytes, and therefore shows less storage capacity.
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Available storage capacity (including examples of various media files) will
vary based on file size, formatting, setting, software and operating system
and other factors.
User's Manual EN-10