WDC My Book Thunderbolt Duo Drive Pricing and Shipping Announced

At Macworld 2012, we highlighted the newly announced My Book Thunderbolt Duo drive from WDC. Each drive enclosure held two hard drives in a RAID configuration and offered two Thunderbolt ports. The units could then be daisy chained together over Thunderbolt to create a single high performance logical drive.
WDC has since announced shipping and availability of the new drive systems.
The new My Book Thunderbolt Duo provides professionals and Mac® enthusiasts with five primary areas of performance, double-safe data protection and flexibility; ultra-fast data transfer rates for greater work efficiency; a 4 TB/6 TB large-capacity; customized dual-drive storage system with RAID 0, 1 and JBOD options; customer serviceable drives; and dual Thunderbolt ports for daisy-chaining multiple My Book Thunderbolt Duo devices or other peripherals.
Pricing for the new enclosures has been set at $599.99 USD MSRP (4 TB) and $699.99 (6 TB) and are available online.
To compare, the Thunderbolt version seems to carry a $200 premium over their My Book Studio Edition II drive system which provides a similar setup (4TB/$399, 6TB/$499), though without Thunderbolt performance and connectivity.
Popular Stories
In iOS 27, available now, CarPlay gets its biggest update in years, but some features depend on what type of car you have rather than your iPhone model. Some of the biggest additions won't do anything in the vast majority of vehicles on the road today. Here's how the new features pan out.
Works in Any CarPlay Vehicle
Custom widgets: In iOS 27, CarPlay is no longer limited to Apple's handful ...
The new Apple Watch Series 12 and Apple Watch Ultra 4 have hardware changes that allow for faster charging, but you will need to use the new version of the Apple Watch Magnetic Fast Charger included in the box in order to achieve this boost. If you need extra ones for your own charging stands or travel or so forth, Apple released the new version of the charger on its online store last week, with...
Wednesday September 16, 2026 1:32 pm PDT by
Juli CloverThe iOS 27.2 beta that Apple released today adds a feature that reminds you it's your anniversary when you call someone, as long as you've added the date in the Contacts app.
On the date of your anniversary, when you go to call the person, you'll see a reminder that it's an important day so you don't forget to say something. The anniversary alert uses Call Context, a feature Apple added in...