# Secondary Storage Devices

Secondary storage is used for long-term data storage. It stores data not currently in use by the CPU. It is slower than primary storage but has much larger capacity.

## Magnetic storage

Uses magnetic fields to store data. Example: Hard Disk Drive (HDD).

## Optical Storage

Uses lasers to read/write data. Examples: CDs, DVDs.

## Solid-State Storage

Uses flash memory with no moving parts. Faster and more reliable. Examples: SSDs, USB drives.

###### Bar Chart

Styling for the bar chart can be found in the `/js/demo/chart-bar-demo.js` file.

###### Donut Chart

Styling for the donut chart can be found in the `/js/demo/chart-pie-demo.js` file.

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