WD 4TB Black Performance Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 3.5"
Western Digital 4TB WD Black Performance Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD4005FZBX. All together, the WD Black drive gives you the hard drive performance. Hard Disk Rotational Speed7200 RPM.