Western Digital Ultrastar DC HC550 16 TB

A 16000GB 3.5" HDD on the SAS 12.0 Gb/s interface. At roughly $0.04 per gigabyte it sits in the premium tier. Sequential throughput reaches 550 MB/s reads and 520 MB/s writes, backed by 512MB of cache. At $694.45 it sits in the premium drive bracket.

Use the PlanMyPC system builder to verify it works alongside your other components and to watch live retailer pricing. Western Digital backs the product through its standard warranty channels; check the listing for region-specific terms. Scroll down for the complete spec table; the builder's compatibility checker will warn you about any conflicts with components you have already picked.