2. Storage Capacity
Data can be stored either in the 'internal memory' or on a 'storage device'.
The amount of data and instructions that can be stored is measured in 'bytes'.
One byte contains 8 bits (short for Binary Digit). This is the smallest unit of data that can be stored. Each 'bit' is represented as a binary number, either 1 or 0.
A single keyboard character such as the letter A or T takes one byte of storage. A single mp3 music track is typically 3Mb
We normally refer to the capacity of a storage device in terms of Kilobytes (kB), Megabytes (MB), Gigabytes (GB) - or even Terabytes!
|Bit||Smallest unit of data, either a 0 or 1|
|Kilobyte (kB)||Assumed to be 1,000 bytes. In reality it is really 1,024 bytes|
|Megabyte (MB)||1,000 kilobytes (1,024 Kb)|
|Gigabyte (GB)||1,000 Megabytes (1,024 Mb)|
|Terabyte (TB)||1,000 Gigabytes (1,024 Gb)|