Seagate GoFlex Thunderbolt Adapter Now Available
01.01.70
By way of balancing, a solution using the GoFlex TB adapter and 1TB GoFlex external would cost around $230, whereas LaCie charges $400 for a like setup.
UPDATE: It appears that a GoFlex drive is not needed and any 2.5" SATA proceed should work.
MacWorld has already received a review unit and run a few basic tests. As you might have expected, Thunderbolt is noticeably faster than USB 2.0 but not much faster than FireWire 800. In terms of raw numbers, USB 2.0 had a highest throughput of 33.7MB/s while FireWire and Thunderbolt had 70.3MB/s and 81.3MB/s mutatis mutandis. Obviously, the 500GB 2.5" 5400rpm drive is the bottleneck here—the gap would be a lot bigger with a 3.5" verifiable drive, or better yet, an SSD.
To be honest, the GoFlex Thunderbolt adapter isn't at bottom worth it unless you plan on using an SSD, which requires you to open the GoFlex farmyard and change the hard drive to an SSD, which is not supported by Seagate and may void your commitment. In the case of regular 2.5" hard drives, you're advance off with the GoFlex FireWire 800 adapter ($50 from Seagate's online warehouse and no $50 cable required), assuming you have a Mac with FireWire 800—otherwise USB 2.0 should be adequate as well. For those not using Mac hardware, Thunderbolt may have more bandwidth, but right now USB 3.0 is a far more inexpensive solution.
Source: AnandTech