Lenovo Portable Hard Drive User’s Guide
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13
1MB=1000
×
1000 bytes=1 million bytes (the decimal system);
1GB=1000
×
1000
×
1000 bytes=1 billion bytes (the decimal
system);
1TB=1000
×
1000
×
1000
×
1000 bytes=1000 billion bytes (the
decimal system).
Inside the computer, the calculation is based on the binary
system. For the conversion purpose, similar KB, MB, GB and
TB are taken as the units of measurement respectively, hence:
1KB=1024 bytes;
1MB=1024
×
1024 bytes=1048576 bytes, approximately equal
to 1.05MB (the decimal system);
1GB=1024
×
1024
×
1024 bytes=1073741824 bytes,
approximately equal to 1.07GB (the decimal system);
1TB=1024
×
1024
×
1024
×
1024 bytes=1099511627776 bytes,
approximately equal to 1.1TB (the decimal system).
Since the calculation methods above are different, the nominal
hard diskcapacity of the product is therefore also different from
that as shown inside the computer. For example, the hard disk
with the nominal 40GB (the decimal system) capacity, if
converted as inside the computer, it is approximately 37.25 GB
(the binary system).
