Hornettek HT-3402U3 Enterprise JBOD Quad Bay 12TB (12-Terabyte) USB 3.0 & eSATA External Hard Drive - Retail Capacity: 12TB (12000GB) Build-in 4 x 3TB 64MB Cache 7200RPM SATA Hard Drives USB 3.0 or eSATA Interface Access 4 hard drives individually (JBOD Technology) Build in 80mm Cooling fan