WD Red 4TB NAS SATA HDD WD40EFPX 6Gb s 256MB Cache 3 5 Inch Internal Hard Drive for NAS Systems 24 7 Operation 3 Year Warranty

Brand: Western Digital (WD)

Series / Model: WD Red 4TB NAS Internal HDD (Model WD40EFPX) WD Red 4TB NAS Internal Hard Drive

Storage Capacity: 4 TB

Form Factor: 3.5‑inch internal hard drive designed for NAS systems 

Interface: SATA III 6 Gb/s                                                                                                 

About This Item

• High‑capacity 4 TB internal hard drive designed specifically for NAS (Network Attached Storage) systems.

• SATA III 6 Gb/s interface delivers reliable data transfer performance and broad compatibility.

• Built for continuous 24/7 operation, ideal for home, small office, and business NAS environments.

• Large onboard cache helps improve data throughput for multi‑user and multitasking use cases.

• Engineered for durability and long‑term reliability under sustained workloads.

• Compatible with a wide range of NAS units and RAID configurations.

• Supports data storage, backups, media libraries, file sharing, and network‑level redundancy.

• Backed by a 3‑year manufacturer warranty for peace of mind