Today only, Sep 10, 2013, TigerDirect has the Drobo Mini 4-Bay USB 3.0 / Thunderbolt Portable Storage Array Enclosure, model no. DR-MINI-1A21, for $299.99 (649.99 – 350 instant savings) with Free Shipping for a limited time.

It’s a Drobo, so by definition it’s easy-to-use. Now it’s also the fastest portable storage array–with cutting-edge Thunderbolt (for daisy-chaining Thunderbolt devices) and USB 3.0 connectivity and innovative use of solid state drives (SSDs). Along with the power of BeyondRAID, it delivers all the power and flexibility of its larger sibling, Drobo 5D, in a miniaturized package. It can hold up to four SATA hard drives or solid state drives, as well as one mSATA SSD in the accelerator bay