Is terabyte smaller than kilobyte

No, a terabyte is not smaller than a kilobyte; in fact, it is much larger. One terabyte is equal to 1,024 gigabytes, and one gigabyte is equal to 1,024 megabytes, which in turn is equal to 1,024 kilobytes. Therefore, a terabyte contains approximately 1,073,741,824 kilobytes.