Western Digital WD Red Pro 4 TB

A 4000GB 3.5" HDD on the SATA interface. At roughly $0.16 per gigabyte it sits in the premium tier. Sequential throughput tops out at 550 MB/s reads and 520 MB/s writes, backed by 64MB of cache. SATA throughput caps near 550 MB/s — fine for game libraries and backups, slower for heavy scratch work.

Expect to pay around $654.99, 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. Support and warranty service run through Western Digital, with terms that vary by region. The full specification sheet below breaks out every listed detail, and the compatibility checker flags conflicts with parts already in your build.