WD Red Plus 4TB NAS HDD — 3.5" SATA 6Gb/s, 5400 RPM, CMR, 256MB Cache (Home Server Storage)

Primary unit: 4TB WD Red Plus NAS hard drive built for home server environments — 3.5" form factor with SATA 6Gb/s interface, 5400 RPM spindle speed, CMR technology and 256MB cache. Complementary storage options and upgrades: SSD 500GB NVMe M.2 for fast boot and load times; 2.5-inch SATA Hard Drive 1TB to expand reliable capacity; High-Speed Internal HDD 2TB with 7200 RPM Performance for applications needing quicker disk access; Compact 128GB SSD M.2 PCIe ideal for laptop upgrades; 1TB Internal Solid State Drive with Enhanced Durability for long-lasting, high-capacity solid-state storage.