Preferred by DVD drive manufacturers, Verbatim DVD media continues to set the standard for high-speed disc performance, reliability, and compatibility. DVD+R Double Layer nearly doubles the storage capacity with two AZO recording layers on a single-sided disc. Certified and supported by the industry high speed Double Layer writers, Verbatim discs are approved for high speed burning up to 6x speeds. Store up to 8.5GBs of video in approximately 16 minutes or less while maintaining compatibility with most DVD video players or DVD-ROM drives. All backed by Verbatim's limited lifetime warranty.
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I use these discs to backup a certain kind of DL-DVD discs and they work the best out of all the discs I have used. I haven't used very many different brands but the one I had tried before didn't work. I did some research on forums and everyone said that these are the best for my BackUp needs.
If you just want to back up some data from your pc I would think that the cheaper discs would work. I only use these discs because I have to for what I am doing.