Description
Western Digital WD Red Plus WD40EFPX 4TB 3.5-Inch SATA 6Gb/s 5400RPM NAS Internal Hard Drive
4TB 5400RPM NAS HDD – WD Red Plus Series (CMR Technology)
The Western Digital WD40EFPX WD Red Plus is a 4TB 3.5-inch internal hard drive engineered specifically for NAS systems in home offices and small to medium business environments. Designed with SATA 6Gb/s connectivity and NASware™ firmware, this drive delivers reliable performance for 24×7 continuous operation.
Built using CMR (Conventional Magnetic Recording) technology, WD Red Plus ensures consistent write performance and improved RAID compatibility compared to SMR-based drives.
Built for NAS & RAID Environments
Optimized for NAS systems with up to 8 bays, RAID configurations, file sharing servers, backup solutions, and always-on storage environments. Compatible with NAS systems and platforms supporting 3.5-inch SATA drives.
Key Features
4TB Storage Capacity
3.5-Inch Form Factor
SATA 6Gb/s Interface
5400 RPM Performance Class
CMR Recording Technology
NASware™ Firmware
Up to 180TB/Year Workload Rate
24×7 Continuous Operation
3-Year Limited Warranty
Optimized NAS Performance
NASware™ technology improves drive compatibility, reliability, and error recovery in RAID environments. This helps reduce downtime and ensures smoother RAID rebuilds in multi-drive NAS systems.
With support for workloads up to 180TB per year, WD Red Plus drives are built to handle consistent file transfers, backups, and multi-user access in business and home NAS environments.
Reliable & Efficient Operation
The 5400 RPM performance class provides lower power consumption and quieter operation, making it ideal for always-on NAS systems. The drive is tested for stable operation in high-temperature and multi-drive environments.
Ideal Applications
Home and small office NAS systems
Small to medium business NAS
RAID arrays (up to 8 bays)
Backup and archival storage
Media servers and file sharing
24×7 network storage environments
Technical Specifications
Brand: Western Digital
Series: WD Red Plus
Model: WD40EFPX
Capacity: 4TB
Form Factor: 3.5-Inch
Interface: Serial ATA (SATA) 6Gb/s
Rotational Speed: 5400 RPM
Recording Technology: CMR
Workload Rate: Up to 180TB/Year
Drive Type: Mechanical Hard Disk Drive (HDD)
Installation Type: Internal
Color: Red
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