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| Product | WD My Book Thunderbolt Duo (4TB) | Seagate GoFlex Desk Thunderbolt adapter | Elgato Thunderbolt SSD (240GB) | LaCie 2big (4TB, USB 3.0)  | Promise Pegasus R6 (12TB, SATA II) |
| Price | $499.00 to $749.12 | $375.59 | $399.99 to $438.41 | MSRP: $579.99 | $2,304.75 to $2,499.99 |
| CNET editors' rating | 3.5 stars | 4 stars | 3.5 stars | 4 stars | 3.5 stars |
| Average user rating | 0 stars | 0 stars | 1.5 stars | 0.5 stars | 3.5 stars |
| Release date | Info unavailable | Info unavailable | Info unavailable | Info unavailable | Info unavailable |
| Bottom line | The WD My Book Thunderbolt Duo makes a very good external storage device for Thunderbolt-enabled Macs thanks to its comparative affordability, ease of use, and decent performance. | All things considered, the Seagate GoFlex Desk Thunderbolt adapter is currently the best investment for those who want a superfast storage device to use with a Thunderbolt-enabled
Mac. | The Elgato Thunderbolt SSD offers speed and convenience for a very high premium. With limited storage and a very high price tag, the drive is only suitable for Thunderbolt-enabled
Mac owners with deep pocket and a dire need for a high-speed storage device. | The LaCie 2big USB 3.0 is an overall excellent external hard drive. | If you have a Thunderbolt-enabled computer, the Promise Pegasus R6's storage capacity, its features, and especially its performance are worth the hefty investment for those who demand fast external storage. |
| Packaged Quantity | 1 | 1 | 1 | 1 | 1 |
| Weight | 4.9 lbs | 9.2 oz | 9.5 oz | 7.9 lbs | 13 lbs |
| Manufacturer Warranty | 3 years warranty | Info unavailable | 3 years warranty | 3 years warranty | 2 years warranty |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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| MSRP: $579.99 See manufacturer website for availability. |
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Comparison chart
,%20Seagate%20GoFlex%20Desk%20Thunderbolt%20adapter,%20Elgato%20Thunderbolt%20SSD%20(240GB),%20LaCie%202big%20(4TB,%20USB%203.0)%20and%20Promise%20Pegasus%20R6%20(12TB,%20SATA%20II)%20-%20CNET%20Reviews&srcUrl=http://reviews.cnet.com/4504-4_7-0.html?id%3D35169645%26id%3D35163406%26id%3D35163034%26id%3D34185206%26id%3D34855283&x_breadcrumb=4){kind=small}