LG Electronics External Optical Drive Optical Drives WP50NB40 Drive Type: External Slim Portable Blu-ray Writer Interface: USB 2.0(480 Mb/s) Buffer Memory: 4 MB Write: CD-R: 24X, CD-RW: 16X, DVDR SL/DL: 8X, DVDRW: 8X/6X, DVD-RAM: 5X, BD-R SL/DL: 6X, BD-RE SL/DL/TL: 2X Read: CD-R/RW/ROM: 24X, DVD-ROM: 8X, BD-ROM SL/DL: 6X.Sustained transfer rate BD-ROM 26.97 MB/s