Buffalo TS3420DN0802

Overview

The Buffalo TS3420DN0802 is a four-bay network attached storage (NAS) system designed to centralize file storage and backup for small businesses and teams of up to thirty users. It comes partially populated with two 4TB NAS-grade hard drives, providing 8TB of storage capacity from the start while leaving two bays open for future expansion. Powered by a 1.4 GHz Annapurna Labs quad-core processor and 1 GB of DDR3 memory, it ensures smooth data transfers even when multiple users access files simultaneously. The integrated 2.5 Gigabit Ethernet port offers faster network speeds over existing copper cabling, making it well suited for handling large media files and databases.

Key features

• Two pre-installed 4TB NAS-grade drives deliver tested and reliable 8TB storage capacity out of the box.
• Four-bay chassis with two empty slots allows easy storage expansion as your data needs grow.
• Supports multiple RAID configurations (0, 1, 5, 6, 10, and JBOD) to tailor data protection and performance to your workload.
• 1.4 GHz quad-core processor combined with 1 GB DDR3 memory keeps file sharing responsive under multi-user access.
• 2.5 Gigabit Ethernet port enables faster data transfers using standard copper network cables without needing upgrades.
• Pre-configured RAID array simplifies setup, allowing most users to start storing data within minutes.
• Compatible with popular cloud services for automated off-site backup, adding an extra layer of data protection.
• Built-in 256-bit drive encryption and optional two-factor authentication enhance security for sensitive information.
• Hot-swappable drive trays enable replacing failed disks without powering down or interrupting operations.
• Manufactured in Japan with TAA-compliant components, backed by a three-year warranty and 24/7 North America-based support.

Key specs

• Storage capacity: 8 TB (2 x 4 TB NAS-grade drives installed)
• Drive bays: 4 total, 2 open for expansion
• Processor: Annapurna Labs quad-core 1.4 GHz
• Memory: 1 GB DDR3
• Network interface: 2.5 Gigabit Ethernet port
• RAID support: 0, 1, 5, 6, 10, JBOD
• Drive encryption: 256-bit
• Drive trays: Hot swappable
• Warranty: 3 years

Connectivity and compatibility

The NAS connects to your existing network through a 2.5 Gigabit Ethernet port, which offers faster transfer speeds than standard Gigabit Ethernet without requiring new cabling. This makes it easy to integrate into most office environments. It supports a variety of RAID modes to optimize for speed, redundancy, or a balance of both, depending on your data protection needs. Additionally, it can link with leading cloud platforms to automate off-site backups, providing resilience against data loss from physical damage or accidental deletion.

Performance and reliability

The combination of a quad-core 1.4 GHz processor and 1 GB of DDR3 memory ensures that file sharing remains smooth even when multiple users access the NAS simultaneously. Hot-swappable drive trays allow you to replace failed disks without downtime, maintaining continuous access to your data. The device’s 256-bit encryption and optional two-factor authentication protect sensitive files from unauthorized access, making it suitable for business environments where data security is critical.

Ideal uses and environments

This NAS is a strong choice for small businesses, creative teams, and workgroups that need a reliable, expandable storage solution without relying on cloud subscriptions. It fits well in office settings where fast local access to large files is essential, such as media production, software development, or document collaboration. The pre-configured setup and robust support make it accessible for IT administrators and users who want a straightforward, secure way to centralize and protect their data.

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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