How many bytes are there in a terabyte?

A terabyte is a unit of digital information storage and is equivalent to one trillion bytes. This measurement comes from the fact that the prefix "tera-" in the International System of Units denotes multiplication by one trillion (10^12). Therefore, when quantifying storage capacity, a terabyte is always understood as being 1,000,000,000,000 bytes. This understanding is crucial for computing and data storage, especially when dealing with large amounts of information.

The other options present quantities that do not align with the correct definition of a terabyte. For instance, one billion bytes corresponds to a gigabyte, which is a smaller unit, while one hundred million bytes is far less than a gigabyte. One thousand bytes is an even smaller measure, typically referred to as a kilobyte. Understanding these conversions is essential for anyone working in software and app design, as it influences how data storage is managed and represented in applications.