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Double layer means the technology used there is more than one layer and I would recommend both.
Sorry, there was a problem. Please try again later.The link to the product that you are inquiring about is the LG Slim Portable DVD Writer DVD Disc Playback & DVD M-DISC™ Support, Model # SP80NB80. Unfortunately, we do not know which model you would like to compare it to. DVD+R DL (DL stands for Double Layer) also called DVD+R9, is a derivative of the DVD+R format created by the DVD+RW Alliance. These discs employ two recordable dye layers, each capable of storing nearly the 4.7 GB capacity of a single-layer disc, almost doubling the total disc capacity to 8.5 GB...^IFV
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