The CD's ó compact discs are some of the most widely used mass storage devices in the world. This type of disc uses a metallic layer with a coating that allows it to store a large amount of binary data with higher audio and video quality than traditional analogue systems.
Due to its portability and small size, the CD displaced well-established formats such as the cassette and the traditional 33 rpm vinyl record. With the advance of electronics, this type of disc, which is read by a laser, could also be played by portable devices, which massified the use of this data storage format.
The advance of PCs has also considerably increased the use of CD's. However, their use is now declining somewhat with the advent of new and improved formats that use the same principle of digital storage.
Here is a video explaining how to do it. how a CD works: