Western Digital Blue 4 TB (WD40EZZX)

This is a 4000GB 3.5" HDD on the SATA interface. At roughly $0.04 per gigabyte it sits in the high-end tier. Sequential throughput reaches 550 MB/s reads and 520 MB/s writes, backed by 256MB of cache. SATA throughput caps near 550 MB/s — fine for game libraries and backups, slower for heavy scratch work.

Its $179.99 price tag places it squarely in high-end territory. Drop it into the PlanMyPC builder to check compatibility with the rest of your parts and fold its price into your running build total. Western Digital backs the product through its standard warranty channels; check the listing for region-specific terms.