A byte is a group of bits, typically 8 bits in length. … A byte is also the smallest unit of storage in a computer's memory, each of which has a unique address. A kilobyte (KB) is 2^10 bytes which is 1,024 bytes. A megabyte (MB) is 2^20 bytes which is 1,048,576 bytes or 1,024 KB. A gigabyte (GB) is 2^30 bytes which is 1,073,741,824 bytes or 1,024 MB. A terabyte (TB) is 2^40 bytes which is 1,099,511,627,776 bytes or 1,024 GB.