About a year ago, Western Digital announced that they have launched a 2TB external hard drive.  But now they have doubled the capacity in the My Book Studio Edition II.  The external hard drive is a dual-drive with 2TB each in a RAID 0 configuration.  It is compatible with Macs and PCs.  Connection options include FireWire 400, FireWire 800, eSATA, and USB 2.0.  This high capacity hard drive comes at a high price of $649.99.

[via Engadget]