Blank optical disk where you can save only once, even when not the whole space available is used.

Amount of data a floppy Disk can store

Removable and rewritable electronic data storage device that can be plugged into almost any PC

Compact Disk Rewritable: Rewritable Optical disk where you can save and erase data several times.

A compact disk containing permanently stored data that cannot be altered/edit

Solid electronic data storage device used in cameras, telephones, laptops, music players and video games consoles.

ROM stands for

Internal storage of a computer

Basic Unit of Measurement storage in computer science