Format Excel numbers as GB, MB, KB, B

Here is a great tip for formating numbers in Excel as Gigabytes, Megabytes, Kilobytes, Bytes, etc.
Use the following formula:

=IF((A1>=POWER(2,30)),
TEXT((A1/POWER(2,30)),"##0.00\G"),
IF((A1>=POWER(2,20)),
TEXT((A1/POWER(2,20)),"##0.00\M"),
IF((A1>=1024),
TEXT((A1/1024),"##0.00\K"),
TEXT((A1/8),"##0.00\B")
)
)
)

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