Adorama via eBay Daily Deals offers the Drobo 4-Bay USB 3.0 NAS Array (DDR3A21) for $229.99 shipped. This is a savings of $70 off the regular price and Amazon’s current listing, as well as the lowest that we can currently find it. This NAS is rated 3.8/5 stars by 36 Amazon customers.
The Drobo DDR3A21 features a four-bay storage hot-swappable system with USB 3.0, battery backup memory and supports RAID. Additionally, this NAS four 3.5-inch SATA hard drives for up to 24TB of storage and is compatible with Mac OS X and Windows.
Pack this NAS full of TBs with the highly-rated WD Red 6TB 3.5-inch hard drive for $266 each. These hard drives are designed specifically for use with NAS backup solutions and include a three-year limited warranty.