Read this post to know it.
CD (the abbreviation of Compact Disc) is a digitaloptical discdata storage format.
The standard CDs can hold up to about 80 minutes of uncompressed audio or about 700 MB of data.
The Mini CD has various diameters ranging from 60 to 80 millimeters (2.4 to 3.1 in).
If you want to learn some useful and basic information about CD, like keep in reading.
The standard CD has a diameter of 120 mm which can store approximately 80 minutes of audio.
Music CD does not have error correction capability.
Glass CD:
This CD is made up of glass.
Of course, CD saves some important files for you.
So, you oughta protect it well in your daily life and work to keep your data safe.
