| Megabyte (MB or Mb)
This is a kilokilobyte or 1024 1024 bytes. Numerically this is 220 or
1 048576 bytes. Be careful not to confuse this with mega as in megavolts (MV) which is exactly one million (106).
Gigabyte (Gb)
This is 1024 megabytes which is 230 or 1 073 741 824 bytes. In general engineering, giga means one thousand million (109).
Terabyte (TB or Tb)
Terabyte is a megamegabyte or 240 or 1 099 511 600 000 bytes (Tera =
1012).
Petabyte (PB or Pb)
This is a thousand (or 1024) times larger than the Terabyte so it is 1015
in round numbers or 240 which is pretty big. If you are really
interested, you can multiply it out yourself by multiplying the TB figure
by 1024.
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