Western Digital 4TB WD Blue PC Internal Hard Drive HDD – 5400 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" – WD40EZAZ (Renewed) (WD Factory Recertified)

Western Digital puts our products through extensive Functional Integrity Testing (F.I.T.) prior to any product launch. On average, each new product goes through 600,000 hours of testing. Western Digital also has a detailed Knowledge Base with more than 1,000 helpful articles. You can also call toll-free support 7 days per week in the U.S. and Canada. See the Western Digital Support site for full details. Recommended use – WD Desktop hard drives are tested and recommended for use in PCs, industrial applications and external enclosures.1