Another key feature of WD’s new dual-drive is its user-selectable RAID function, which helps deliver the needed performance for the most demanding applications in the field. Performance-wise, WD quotes speeds up to 233MB/s with its Thunderbolt technology (superior to both FireWire 800 and USB 3.0), which is plenty of oomph for those looking to edit on the fly as well as allowing for speedy backups capabilities. The drive comes in both 2TB and 4TB capacities and features an all metal case and integrated Thunderbolt cable. Today, WD launched the dual-drive My Passport Pro, the first portable, Thunderbolt-powered dual-drive solution on the market designed for creative professionals and enthusiasts who demand mobile storage with both high performance and high capacity.