WD Red SA500 4TB SSD
Best storage upgrade for high-performance network-attached storage systems.
Boost your NAS performance with the WD Red SA500 4TB SSD. Engineered for network-attached storage, this drive excels as a high-speed cache, accelerating access to your most frequently used files. Its advanced 3D NAND Flash architecture ensures impressive read speeds up to 560MBps and write speeds up to 520MBps. Connecting via a SATA III 6Gb/s interface and fitting a 2.5" form factor, it's built for reliable 24/7 operation in demanding NAS environments. Enjoy enhanced responsiveness and efficiency for your data.
$899.99
Owner Satisfaction
4.5
/ 5
Category Rank
685
/ 4074
#685 in Hard Drives
Price vs Category Average
+71%
Above average
Capacity
4
/ TB
Who it's for
- NAS administrators managing constant 24/7 data workloads
- Power users needing faster virtualization and caching speeds
- System builders requiring simple compatibility with legacy hardware
Who should skip it
- Budget-conscious buyers prioritizing cost over specialized endurance
- Performance enthusiasts requiring the speed of NVMe interfaces
- Casual users needing only basic file storage solutions
Performance breakdown
NAS Caching Efficiency
Purpose-built architecture significantly reduces latency for frequently accessed network files.
Operational Endurance
High TBW rating ensures long-term reliability for demanding 24/7 storage workloads.
Sequential Throughput
SATA III interface hits the practical ceiling for legacy drive connectivity.
Random IOPS Performance
Responsive random read and write speeds keep multi-user environments running smoothly.
Power Efficiency
Low power draw minimizes heat output in compact NAS enclosures.
Build Longevity
Five-year warranty reflects confidence in the drive's robust hardware design.
Key Specs
Capacity
4TB
Interface
SATA III 6Gb/s
Form Factor
2.5"
Architecture
3D NAND Flash
Read Speed
Up to 560MBps
Write Speed
Up to 520MBps
Random Write 4K
Up to 83,000 IOPS
Random Read 4K
Up to 87,000 IOPS
Features
- Optimized for NAS caching
- High-speed 3D NAND Flash
- Fast sequential read/write speeds
- Responsive random IOPS
- Reliable 24/7 operation
- SATA III interface
- 5-year limited warranty
What customers say
Users overwhelmingly praise the WD Red SA500 4TB SSD for its exceptional reliability in demanding NAS environments. The specialized design for continuous twenty-four-hour operation and higher endurance ratings are key selling points for constant data access. Switching from mechanical drives brings immediate quality of life improvements, notably reduced noise, vibration, and heat, resulting in a cooler system. Performance is excellent for a SATA drive, offering snappy access and reliable throughput for multi-user tasks and streaming. While this drive represents a premium investment, customers agree the enhanced stability, optimized firmware for RAID, and peace of mind justify the cost for mission-critical storage. It is viewed as a top-tier, purpose-built solution delivering robust long-term stability.
Know before you buy
While it can be used for storage, the WD Red SA500 is specifically optimized for use as a high-speed cache. Using it as a cache drive will significantly improve the responsiveness of your NAS when accessing frequently used files.
Yes, this drive features a standard 2.5-inch form factor and a SATA III interface, making it compatible with most modern NAS systems that support 2.5-inch SSDs.
This drive is purpose-built for continuous operation. It features an endurance rating of 2,500 TBW and a Mean Time Between Failures (MTBF) of 2 million hours, ensuring it can handle the demanding read and write cycles typical of a network-attached storage system.
By using this SSD as a cache, you will notice significantly faster file access times and improved system responsiveness. It offers sequential read speeds up to 560MBps and write speeds up to 520MBps, which far exceed the performance of standard spinning hard drives.
The 5-year limited warranty covers defects in materials and workmanship under normal use in compatible NAS environments. It is a testament to the drive's reliability, though it does not cover data recovery or issues resulting from improper installation.
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