Pros and Cons:
Magnetic: Large storage capacity, relatively low cost per GB | Contains moving parts, slower access than solid state. Example: Hard disk drive.
Optical: Often very portable, low cost per GB | Can be easily scratched (loss of data), low storage capacity. Blu-Ray.
Solid State: High storage capacity, high speed access, portable (no moving parts), fast data transfer | High cost per GB, typically smaller storage capacity compared to magnetic storage devices. Example: USB.