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File Names and Extensions

Work is saved onto a storage device as a file, and you should always give each file a sensible file name so that you can find it again easily.

The computer automatically adds a file extension after the file name. This tells you what sort of information the file contains. Some common file extensions are:

Text .txt .doc
Images .gif .jpeg
Sound .wav .mp3

Directory Trees

Files can be organised into different directories or folders to make it easier to find them. This organisation is known as making a directory tree.

In this directory tree:
  • The root directory is called ‘My Files’.
  • There are three subdirectories called: ‘Photographs’, ‘Homework’ and ‘Music’.
  • There are four files in the ‘Homework’ directory called: ‘Adventure story’, ‘Roman mosaic’, ‘Roman research’ and ‘Town map’.
Making Backups

Sometimes data saved on a storage medium can get lost. This might be because of: a computer virus, accidental deletion, a hardware fault or simply leaving it lying around. It is therefore a good idea to save more than one copy of your work in case the original gets lost. This is known as making a backup.
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