Earlier this week, we took a look at LaCie's high end 2-bay RAID DAS, the 2big Thunderbolt 2. It integrated both USB 3.0 and Thunderbolt 2 as connectivity options. At $800 for a 8 TB version, the pricing carries a premium for the Thunderbolt connectivity. USB 3.0 is, in a way, the poor man's Thunderbolt. With a focus on the average consumer, Western Digital launched the My Book Duo USB 3.0 DAS with hardware RAID capabilities a few weeks back. The 8 TB variant is priced at a more palatable $450. Read on to see how it performs in our evaluation.