Amazon.com: WL 3TB 64MB Cache 5400RPM SATA III (6.0Gb/s) (Low Power & Heavy Duty) 3.5" Internal Hard Drive (PC, NAS & CCTV DVR) - w/ 1 Year Warranty : Electronics
Amazon.com: Seagate Constellation ES.3 | ST3000NM0033 | 3TB 7.2K RPM 128 MB Cache 3.5" SATA 6Gb/s | Enterprise Internal Hard Disk Drive HDD : Electronics
Seagate BarraCuda 3TB 7200 RPM SATA 3.5" Hard Drive - Newegg.com