Secondary Storage

SECONDARY STORAGE

secondary storage devices

Secondary storage, sometimes called as external memory and auxiliary storage, a secondary storage device is any non-volatile medium that holds data until it is deleted or overwritten. Secondary storage is about two orders of magnitude cheaper than primary storage. Consequently, had drives (a prime example of secondary storage) are the go-to solution for nearly all data kept on today's computers.

The image shows three different types storage for computer data, but offline storage should be considered a subset of secondary as they both serve the same purposes and do not interact directly with the CPU. The key differences being that offline storage is used as a way to physically transport information, generally has less capacity, and isn't accessible without human interaction.

Typically, secondary storage is used to back up primary storagethrough replication, which involves holding a secondary copy of the data. To choose an effective secondary storage media, one must first understand the data's value, how often it's used and how it will be accessed. External hard drives, portable USB flash drives, CDs, DVDs,mamory card and cloud backup are often used for secondary storage. Generally, secondary storage devices perform at a lower level than primary storage and are less expensive. For many companies, placing a second class of storage between their primary storage

The image below shows three different types storage for computer data, but offline storage should be considered a subset of secondary as they both serve the same purposes and do not interact directly with the CPU. The key differences being that offline storage is used as a way to physically transport information, generally has less capacity, and isn't accessible without human interaction.