Hewlett-Packard Media Vault mv2120 500GB Network Attached Storage for $169.99 shipped after applying coupon code SV2132.  Here is a screenshot for your reference.  This is a popular network storage device that runs on Microsoft Home Server for automated backup and other functions.  It has 2 drive bays to accommodate 3.5" SATA drives with 2 USB 2.0 ports and gigabit Ethernet network speed.  The HP Media Vault mv2120 comes with one 500GB SATA internal hard drive already installed and one available expansion bay.  Most places have it for over $230.