How many KB is 2GB?

There are 1024 kilobytes (KB) in one megabyte, and 1024 megabytes in one gigabyte (GB)

So 1024 kilobytes X 1024 megabytes = 1048576 kilobytes in one gigabyte

1048576 kilobytes X 2 = 2,097,152 kilobytes in 2 gigabytes