File sizes and storage device capacities are measured in bytes. One byte is the amount of space it takes to store a single character of text.

A kilobyte is 1024 bytes and is abbreviated as KB.

A megabyte is 1024 KB (about a million bytes) and is abbreviated as MB.

A gigabyte is 1024 MB (about a billion bytes) and is abbreviated as GB.

The following terms are equivalent:

                  1 GB
    =         1,024 MB
    =     1,048,576 KB
    = 1,073,741,824 bytes