When you have a computer or other electronic device, it can store information or data in it. However, it is not unlimited. There is only so much room to store documents and other bits of information. To measure the amount of storage space on a digital device, the measurement is called a byte. Most are measured in gigabyte, but the larger storage spaces may measure in a terabyte or petabyte. Today, most computers are measure in gigabytes.
The more gigabytes you have in your computer, the more information you can store on your computer. There are one thousand gigabytes in a terabyte. This means that one gigabyte is 1/1000 of a terabyte. The next larger levels after terabyte are petabyte, Exabyte, zettabyte and yottabyte.