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Western Digital 4TB WD Red SA500 NAS SATA SSD - WDS400T2R0A

Name: Western Digital 4TB WD Red SA500 NAS SATA SSD - WDS400T2R0A
Brand: Western Digital
SKU: B0CVN88YVG
Price: 890.37 USD
Availability: InStock
Rating: 4.7 (2578 reviews)

4.7 (2,578 reviews)

Posted Apr 22, 2026

$890.37$992.59

10% OFFYou save $102.22

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In StockPrice changed 23d ago

Is this a good deal?

Storage optimized for caching in NAS systems to rapidly access your most frequently used files.
Superior endurance can handle the heavy read and write loads demanded by NAS, giving you the reliability you need in a 24/7 environment.
Purpose-built for NAS with proven Western Digital 3D NAND to deliver maximum SATA performance to both home and business users.
Reduces latency and improves responsiveness for OLTP databases, multi-user environments, photo rendering, 4K and 8K video editing, and more.
Available in 2.5” and M.2 form factors to fit the slots in modern NAS systems.

Fair Price

This 4TB WD Red SA500 SSD is 10% off at $890.37. It's built for 24/7 NAS use with high endurance for caching and heavy workloads. Best for home or business NAS users needing reliable, fast storage.

What we like

Designed for 24/7 NAS operation
High endurance for heavy read/write loads
Speeds up to 560 MB/s SATA III
Available in 2.5-inch and M.2 form factors

Watch out for

Price is high compared to 180-day average
Not the fastest option for non-NAS use

Tip: Check if your NAS supports SATA SSDs for caching or primary storage before buying.

Our Take

Best for: NAS owners needing a high-capacity, reliable SSD for caching or primary storage.

The Western Digital 4TB WD Red SA500 is a SATA SSD built specifically for NAS systems. It's designed to handle the constant read and write demands of a 24/7 environment, making it a solid choice for caching frequently accessed files or running applications like databases and multi-user setups. The 3D NAND technology gives it decent endurance, and the 560 MB/s sequential read speed is standard for SATA III drives. What stands out is the reliability focus - it's tested for NAS workloads, which means it won't wear out as fast as a regular desktop SSD in a server. The 4TB capacity is generous for storing large media files or running VMs. However, it's not the fastest SSD out there; NVMe drives are much quicker for direct-attached storage. 64, so the current price is significantly higher. If you need a NAS-specific SSD now, it's a fair price, but you might want to wait for a drop closer to the historical average.

Price Analysis

The current sale price of $890.37 is 10% off the original $992.59, but the 180-day average was $586.64, meaning this is about 52% higher than that average. The 30-day and 90-day averages are both near $990, so this is a recent drop. It's not near an all-time low, so it's a fair price but not a steal.

Common Questions

Is this SSD compatible with any NAS system?

It works with any NAS that has a SATA III port and supports 2.5-inch or M.2 SSDs. Most modern NAS systems from Synology, QNAP, and others will accept it.

What is the endurance rating of the WD Red SA500 4TB?

The 4TB model has a TBW (terabytes written) rating of 2500 TBW, which is high for a SATA SSD and suitable for 24/7 NAS workloads.

Can I use this SSD in a desktop PC instead of a NAS?

Yes, it works in any SATA III port, but it's optimized for NAS environments. For desktop use, a standard SSD like the WD Blue may offer better value.