Storage devices are designed to hold your data on a permanent or semi-permanent basis. They are non-volatile, which means that even when the computer is switched off, the data will still be safe.
Storage media are classified into two categories:
 | Media that can be over-written many times. |
| Media that can only be written onto once. |
Storage devices are sometimes referred to as secondary storage.
The next few page describe these devices and media in more detail.
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