Final answer:
Secondary memory is used to save and retrieve data for long-term use, such as saving and accessing files like slide show presentations on a computer.
Step-by-step explanation:
A computer's secondary memory, also known as storage, is used to save and retrieve data for long-term use.
One reason to use secondary memory is to save files such as a slide show presentation on your computer. This allows you to access and edit the presentation at a later time.
Secondary memory also allows you to look at files created on your home computer on a public computer. By saving files on secondary memory like a USB drive, you can easily transfer and view the files on different computers.
Learn more about Secondary memory for long-term data storage