Explanation:

Kilobyte (KB) is a common measurement unit of digital information (including text, sound, graphic, video, and other sorts of information) that equals to 1000 bytes. In practical information technology, KB is actually equal to 210 bytes, which makes it equal to 1024 bytes. Decades ago, this unit used to be one of the most popular ones, but recently, since the volumes of information increased drastically, such unit as gigabyte has become more commonly used.