There is a big difference between CDs and DVDs. The first big difference is the physical size. A CD is about the size of a hockey puck, while a DVD is about the size of a CD jewel case. The second big difference is the storage capacity. A CD can store about 700 MB of data, while a DVD can store about 4.7 GB of data.

The difference in quality between a CD and a DVD is also significant. A CD typically has a bit rate of 128 kbps, while a DVD has a bit rate of up to 9.8 …