Western Digital WDS400T2R0A-68CKB0

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.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

Learn more

Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

Learn more