A removable, flexible disk used for storage of electronic resources in magnetic form, read and written to by electron-magnetic impulse. Examples : Magnetic disk formats are: floppy disks and hard disks.
A removable, non-flexible disc, used for storage of electronic resources in optical form, read and written to by laser technology.
Examples : CD-I (Compact-Disc Interactive), CD-ROM (Compact Disc Read-Only Memory), Photo CD (Photo Compact Disc).
And the final verdict is
- Use electronic disk for magnetically encoded electronic disks.
- Use electronic optical disc for optically encoded electronic discs.