WD DC HC330 10TB 12Gb/s 7.2K 3.5" SAS HDD WUS721010AL5201 | eBay
WD Ultrastar DC HC520 | HUH721212AL4200 (0F29560) | 12TB 7200 RPM 4Kn SAS 12Gb/s 256MB Cache 3.5-Inch Internal Enterprise HDD Data Center Hard Disk Drive - Newegg.com
WD My Cloud EX4100 8TB SAS Hard Disk Drive Black | Techinn
Western Digital WD Red™ Plus 4 TB 3.5" (8.9 cm) internal HDD SAS 6 Gbps WD40EFRX Bulk | Conrad.com