Definition
Secondary storage technology refers to storage devices and storage media that are not always directly accessible by a computer. This differs from primary storage technology, such as an internal hard drive, which is constantly available.
Examples of secondary storage devices includeexternal hard drives, USB flash drives, and tape drives.
These devices must be connected to a computer's external I/O ports in
order to be accessed by the system. They may or may not require their
own power supply.
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