Buffalo TS3420DN0402

Overview

The Buffalo TS3420DN0402 is a four-bay network attached storage (NAS) server designed to provide reliable and expandable centralized storage for small offices, creative studios, and branch locations. It comes partially populated with two 2 TB NAS-grade hard drives, offering 4 TB of storage capacity out of the box, with two additional bays available for future expansion. Powered by a 1.4 GHz quad-core processor and 1 GB of DDR3 memory, it handles multiple simultaneous tasks such as file sharing, media streaming, and automated backups efficiently. Dual Ethernet ports support both Gigabit and 2.5 Gigabit speeds, allowing flexible integration with current and future network infrastructures.

Key features

• Four-bay chassis with two pre-installed 2 TB drives and room for two more, enabling easy storage expansion as your data needs grow
• Support for multiple RAID configurations (0, 1, 5, 6, 10) and JBOD, giving you control over data protection and performance
• Hot-swappable drive bays that allow you to replace or add drives without interrupting system operation, ensuring continuous access to your data
• Dual Ethernet ports with one Gigabit and one 2.5 Gigabit interface, providing flexible network speed options and future-proofing your setup
• Integration with popular cloud services like Dropbox and Amazon S3, facilitating hybrid backup strategies and offsite data protection
• Closed operating system combined with AES-256 encryption to safeguard sensitive information against unauthorized access
• Backed by a three-year warranty, 24/7 U.S.-based support, and data recovery service for peace of mind and reliable assistance

Key specs

• Storage capacity: 4 TB (2 x 2 TB NAS-grade hard drives pre-installed)
• Drive bays: 4 total, 2 open for expansion
• Processor: 1.4 GHz quad-core
• Memory: 1 GB DDR3
• Network interfaces: 1 x Gigabit Ethernet, 1 x 2.5 Gigabit Ethernet
• RAID support: 0, 1, 5, 6, 10, and JBOD
• Encryption: AES-256
• Warranty: 3 years with 24/7 U.S.-based support and data recovery service

Connectivity and compatibility

This NAS server offers versatile network connectivity with dual Ethernet ports, allowing you to connect to standard Gigabit networks or faster 2.5 Gigabit setups without needing to replace the device. It supports common file-sharing protocols, making it compatible with a wide range of operating systems and devices in your office or studio environment. Cloud integration with Dropbox and Amazon S3 further extends your backup options beyond local storage.

Performance and reliability

The combination of a quad-core processor and dedicated memory ensures smooth performance even when multiple users access large files or run scheduled backups simultaneously. Hot-swappable drive bays minimize downtime during maintenance or upgrades, while RAID options provide customizable levels of data protection to suit your priorities. The closed operating system and strong encryption add layers of security to protect your valuable data.

Ideal uses and environments

This NAS server fits well in small business settings where reliable, always-on access to shared files is essential. It is a strong choice for office managers who need straightforward centralized storage, IT administrators responsible for dependable backups, and creative teams collaborating on large media projects. The expandability and flexible network options make it adaptable as your storage demands and infrastructure evolve.

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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