False, They can use optical storage discs.
no,harddisk is not an optical storage
Optical Storage Medium
No, its not an optical storage device.
Neither. They are removable magnetic storage. Optical storage consist of CDs, DVDs, etc.
DVDs or CDs
An Optical Disk
magnetic storage device
DVDs and CDs are both types of optical storage. Optical discs such as DVDs and CDs are certainly more durable than previous storage methods, however, they can still be damaged through everyday use and exposure to the environment.
Magnetic storage optical storage solid-state storage storage capacity
No. Optical storage uses lasers to "see" the media (e.g. CD, DVD, HD-DVD and BluRay)
If you need to any further detail on example of optical storage so you can visit.. http://opticalstorage.org/