Western Digital Red SA500 4TB 2.5" 7mm NAS SATA 6Gb/s Internal SSD

Overview

The Western Digital WDS400T2R0A-68CKB0 is a 4TB internal solid state drive designed specifically for network attached storage (NAS) systems. It connects via a SATA 6 Gb/s interface and fits into a 2.5-inch, 7mm drive bay, making it compatible with a wide range of NAS devices that require reliable, high-capacity storage. With sequential read speeds up to 560 MB/s and write speeds up to 520 MB/s, this SSD delivers fast and consistent performance for demanding storage tasks.

Built to support continuous 24/7 operation, it is ideal for environments where data availability and responsiveness are critical, such as small business servers, creative workstations, and home media servers. Its endurance rating and advanced NAND technology ensure it can handle heavy workloads without compromising reliability.

Key features

• Designed for around-the-clock NAS operation, ensuring stable performance in always-on environments
• High sequential read and write speeds that enable smooth file transfers and quick access to large data sets
• Strong random IOPS performance to maintain responsiveness in multi-user or application-intensive scenarios
• Endurance rated at 2500 TBW, supporting sustained heavy read/write cycles without degradation
• 3D NAND technology with caching to improve efficiency and reduce latency during repetitive tasks
• Compact 2.5-inch, 7mm form factor fits a wide range of NAS devices and storage enclosures
• Backed by a 5-year limited warranty for long-term reliability and peace of mind

Key specs

• Capacity: 4 TB
• Form factor: 2.5-inch, 7mm
• Interface: SATA 6 Gb/s
• Sequential read speed: up to 560 MB/s
• Sequential write speed: up to 520 MB/s
• Random read IOPS: 87,000
• Random write IOPS: 83,000
• Endurance: 2500 TBW (terabytes written)
• Technology: 3D NAND
• Warranty: 5-year limited

Connectivity and compatibility

This SSD uses a SATA 6 Gb/s interface, which is widely supported by most NAS devices and storage enclosures that accept 2.5-inch drives. Its slim 7mm height ensures compatibility with compact NAS units and laptops that require low-profile drives. The drive’s design focuses on seamless integration into NAS environments, providing reliable storage for multi-user access and continuous data availability.

Ideal uses and environments

The Western Digital Red SA500 4TB SSD is well suited to users who need dependable, high-capacity storage in NAS systems that run continuously. It works well in small business servers handling file sharing and backups, creative workstations managing large media files, and home media servers streaming content to multiple devices. Its endurance and performance characteristics make it a strong choice for setups that demand both speed and durability over long periods.