CD-R is a write once format. CD-RW burners and most new DVD burners can write in CD-R, and most DVD players can also read this format. The CD-R format is commonly used for storage of computer data, music, and video.

CD-RW is a rewritable CD format. CD-RW burners and most new DVD burners can write in CD-RW, and most DVD players can also read this format. The CD-RW format is best suited for temporary storage.