The choice of file format to use depends on:
- The file contents
- How best to store the contents
- Which software application has created the file
- How the user intends to use the file
The contents of a file may be video, audio, images, text, or numbers which have to be stored in a way that ensures that the data can be retrieved and used again at a later date.
A DTP file saved on a computer disk will contain text, numbers and images which have to be linked so that they are in the correct place when the file is opened again.
Choosing a file format for saving an image is important as most image file formats compress the image and this may lose some of the details
Files that are intended to be shared should be saved in a format that most, if not all, computers and portable devices can use
Sharing files over the internet will influence the choice of format because very large files can take a very long time to send or receive.
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