We told you late last night that LaCie Thunderbolt disks were arriving in Apple Retail Stores.  Today, LaCie officially announced the availability of its new products which hit the Apple online Store today for $399 (1TB) and $499 (2TB) earlier today.

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That is a $100+ premium over their Firewire drives and you’ll need a $49 Apple Thunderbolt Cable.

It appears that these drives are limited by the speed of the 2.5-inch drives, not by the bus as the faster SSD blows away the HDD version.  It is curious that they didn’t make a 3.5-inch variety which would have allowed for much greater speed and cost much less.

The SSD version will ship next month.

Promise sells their 4TB Thunderbolt RAID boxes for just over $1000, 8TB for $1500 and 12TB for $2000.

Full Press release follows:

“The great thing about the LaCie Little Big Disk Thunderbolt Series is its versatility,” said Erwan Girard, Professional Business Unit Manager, LaCie. “No matter which Little Big Disk model you choose, it will serve your most demanding applications with ease and portability. It’s the ultimate in storage technology.”

For more than 20 years, LaCie has worked in the Apple™ marketplace, introducing innovative products and launching cutting-edge technologies. LaCie developed the first Apple branded storage solution and showcased the first implementations of FireWire technology. Since then, LaCie has collaborated with Intel™ and Apple to develop a range of professional storage solutions featuring Thunderbolt technology.

AVAILABILITY The LaCie Little Big Disk Thunderbolt Series HDD models are available through Apple retail stores worldwide and Apple.com. The SSD model will be shipping this October. All models will be available shortly through LaCie’s reseller channel and LaCie.com. The Thunderbolt cable can be purchased separately on Apple.com. For full specifications and product information on the LaCie Little Big Disk Thunderbolt Series visit: http://www.lacie.com/us/products/product.htm?id=10549.

WIN A LITTLE BIG DISK THUNDERBOLT SERIES Be one of the first to enjoy the next generation of high-speed storage – the LaCie Little Big Disk Thunderbolt Series. One winner will be selected each Thursday for the next four weeks. For additional details and to enter now visitwww.facebook.com/lacieworldwide.

ABOUT LACIE With operations in the Americas, Europe and Asia, LaCie is a leading manufacturer of storage devices for PC, Apple, and Linux. LaCie has differentiated itself through sleek design and remarkable technical performance. Find out more about our products at www.lacie.com.

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Thunderbolt and Thunderbolt logo are trademarks of Intel Corporation in the US and/or other countries. All trademarks are the property of the respective trademark owners.