Click here to buy this :Sony DRX840U 20x External Dual-Layer DVD Burner
External USB 2.0 DVD+R Double Layer, DVD-R Dual Layer/DVD+RW, DVD-RAM 12X DVD+R Double Layer (DL), 20X DVD+R, 8X DVD+RW, 12X DVD-R Dual Layer (DL), 20X DVD-R, 6X DVD-RW, 12X DVD-RAM 48X/32X/48X CD-RW, 16X DVD-ROM Buffer Underrun Protection Technology. The Sony DRX-840U USB External DVD Multi drive supports 20x max DVD+/-R recording. A High-Speed USB 2.0 Interface and award winning Nero 7 Express software are included. Dimensions - 2.0x6.5x9.8 Weight - 3.5 pounds
Technical Details
* DVD+R double layer and DVD-R dual layer burning
* Store up to 8.5 GB of data on one single sided, double layer DVD disc
* Improved writing speeds for all DVD formats
* Record up to 4 hours of video on double/dual layer discs
* Works with 4.7 GB DVD+R/+RW and 8.5 GB double/dual layer discs
Sony DRX840U 20x External Dual-Layer DVD Burner