A:Answer DVD-R and DVD+R share similarities in that they are both write-once formats, they both have single-sided capacities
of 4.7GB, they both need finalization after recording for broad playback, and both can be used for either data storage
or video applications. The major difference is that they are not interchangeable when it comes to recording.
Because each format writes information to its corresponding disc differently, DVD+R discs must be recorded
by a +R drive or video recorder, and DVD-R discs must be recorded by a -R drive or video recorder. Once recorded,
they share similar playback compatibility. Most DVD drives supplied with computers in the past 5 years are able to
write to both types. Standalone recorders for home entertainment systems may be specific to +R or -R, check the
user manual.