Amazon has the Western Digital My Book Studio II 4TB External Hard Drive for just $279.99 shipped, originally priced at $407.99. Its “lightning-fast FireWire 800 or eSATA interfaces combined with RAID 0 (striping) yields the speed you need.” Product page. Video preview after the break.

Set the system to RAID 1 (mirroring) for the peace of mind in knowing that if one drive in this two-drive system ever fails, the system continues to run and your data is safe.

[via Amazon]