what is the difference between dvd r and cdr?
The Difference Between DVD-R & CD-R. CD-R and DVD-R are optical disc storage formats. ... DVD-R discs have much more storage space, but CD-R discs work with more devices. CD-Rs are an older medium, but they still get the job done, although USB flash drives have replaced the role of CD-R and DVD-R discs in many cases.