B&H Photo Video has the Western Digital WDH2Q60000N My Studio II 6TB External Hard Drive for $349
with free shipping. Formatted in HFS+, but can be reformatted for Windows. Features user-serviceable design, capacity gauge, supports RAID 1 or 0, and a quad-interface (eSATA, USB 2.0, FireWire 400 and 800). Normally $380+. JR.com
has it for $1 more.