Buffalo WS5420DN16S9

Overview

The Buffalo WS5420DN16S9 is a four-bay network attached storage (NAS) server designed to provide 16TB of raw storage capacity with built-in data protection and seamless integration into Microsoft environments. Powered by a 1.5 GHz Intel Atom C3338 dual-core processor and equipped with 8GB of error-correcting DDR4 memory, it delivers responsive file services and supports lightweight virtual machines through its Hyper-V role. This NAS is ideal for small to medium businesses, creative studios, and branch offices that require reliable, high-speed storage with minimal maintenance.

Key features

• Pre-configured RAID 5 array offers immediate data redundancy to protect against drive failure without sacrificing storage capacity.
• Windows Server IoT 2019 operating system ensures compatibility with existing Microsoft networks, allowing easy integration with Active Directory and familiar management tools.
• 10-gigabit Ethernet port accelerates large file transfers and backup operations, reducing wait times for media and database workloads.
• Native support for Azure and OneDrive enables straightforward cloud synchronization and off-site backup without additional software.
• Built-in Hyper-V virtualization allows consolidation of lightweight server roles, reducing the need for extra hardware.
• Lockable front panel prevents unauthorized drive removal, enhancing physical security for sensitive data.
• Error-correcting memory guards against silent data corruption, maintaining data integrity over time.
• Subscription-free snapshot and replication tools simplify disaster recovery planning and data protection strategies.
• Three-year warranty combined with 24/7 US-based support and included data recovery service provides comprehensive peace of mind.

Key specs

• Storage capacity: 16TB (4 x 4TB NAS-grade drives)
• Processor: 1.5 GHz Intel Atom C3338 dual-core
• Memory: 8GB ECC DDR4
• RAID configuration: RAID 5 pre-configured
• Network interface: 10-gigabit Ethernet port
• Operating system: Windows Server IoT 2019
• Drive bays: 4
• Warranty: 3 years with 24/7 US-based support and data recovery service

Connectivity and compatibility

This NAS server fits well into environments that rely on Microsoft infrastructure, supporting Active Directory for user management and seamless file sharing. Its 10-gigabit Ethernet port ensures fast network connectivity, making it suitable for offices with high data throughput needs. The native integration with Azure and OneDrive allows easy cloud backup and synchronization, supporting hybrid storage strategies without requiring additional subscriptions or software.

Performance and reliability

The combination of an Intel Atom dual-core processor and 8GB of ECC DDR4 memory keeps file access smooth even under multiple simultaneous connections or when running lightweight virtual machines. The RAID 5 setup balances storage efficiency with fault tolerance, while error-correcting memory helps prevent silent data corruption. Physical security is enhanced by a lockable front panel, reducing the risk of accidental or malicious drive removal.

Ideal uses and environments

This NAS server is a strong choice for small and medium businesses looking to replace aging file servers with a modern, Windows-based solution. Creative studios managing large video or design asset libraries will benefit from the fast 10-gigabit network interface and reliable data protection. Branch offices needing a low-maintenance backup target will appreciate the familiar Windows Server interface and subscription-free cloud sync options. Overall, it suits users who want enterprise-grade features without complex setup or ongoing subscription costs.

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.

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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.

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