Seagate Exos X24 SED-FIPS 20 TB

A 20000GB 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. Expect to pay around $799.99, which lands it among premium options.

Use the PlanMyPC system builder to verify it works alongside your other components and to watch live retailer pricing. Seagate backs the product through its standard warranty channels; check the listing for region-specific terms. The full specification sheet below breaks out every listed detail, and the compatibility checker flags conflicts with parts already in your build.