Recordable CDs, or CD-Rs, are compact discs that allow users to write data onto them once. They are commonly used for storing music, photos, and other digital files. Once the data is recorded, it cannot be erased or modified, making them a reliable option for permanent storage. These discs are compatible with most standard CD players and drives, making them easy to use. To create a CD-R, a computer with a CD burner and appropriate software is needed. Recordable CDs typically hold up to 700 MB of data, which is equivalent to about 80 minutes of audio.