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What is a MegaByte? (MB)


A MegaByte is equivalent to 8,388,608 Bits or 1,048,576 Bytes in the basic form of digital information storage, being composed of '0's or '1's in any combination.

On a CD or DVD the Bits are represented by 'pits' and 'grounds' (the normal flat metallic surface of the disc without any holes burnt or punched out of it) with a transition between a pit and ground being a 1 and a continuous spell within a pit or a ground being a 0.

On a tape or hard disc the same principle to a CD applies, but the pits and grooves are represented magnetically.

As a rough guide, you can fit 25,000 MegaBytes (or 25 GigaBytes) on a single-layer Blu-ray disc, 50,000 MegaBytes (or 50 GigaBytes) on a dual-layer Blu-ray disc, 4,700 MegaBytes (or 4.7 GigaBytes) of information on a full size (12cm) DVD and 700 MegaBytes (or 0.7 GigaBytes) of information on a standard (12cm) CD.

There are 8 Bits in a Byte, 1024 Bytes in a Kilobyte (KB), 1024 KiloBytes in a MegaByte (MB), 1024 MegaBytes in a GigaByte (GB), 1024 GigaBytes in a TeraByte (TB), 1024 TeraBytes in a PetaByte, 1024 PetaBytes in an ExaByte, 1024 ExaBytes in a ZettaByte and 1024 ZettaBytes in a YottaByte.

 

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