If you are searching for a drive with a fast DVD burning speed, the Sony DRX-840U Multi-Format DVD Burner with Nero 7 Express DVD/CD burning software is all you need. It comes with a maximum burning speed of 20X for DVD+R, 12X for DVD+R dual layer, and 12X for DVD+RW and DVD-RAM. With an average access time of 130 ms and a cache size of 2 MB, the Sony DRX-840U External Dual Layer DVD RW Writer maximizes data storage in minimal time. The hi-speed USB 2.0 interface enables the drive to be connected to Windows Vista, XP, or 2000 systems.