Buffalo TS5420DN0802

Overview

The Buffalo TS5420DN0802 is a four-bay desktop network attached storage (NAS) server designed to provide 8TB of storage capacity with robust security and high-speed performance. Equipped with a 2.04 GHz quad-core processor and 8 GB of DDR4 memory, it handles multiple users and large file transfers efficiently. The device comes with two pre-installed 4TB NAS-grade drives and offers two additional bays for future expansion, making it adaptable to growing data needs.

This NAS supports a variety of RAID configurations including 0, 1, 5, 6, and 10, as well as JBOD, allowing you to tailor the balance between performance, capacity, and data protection. Dual 1 GbE and dual 10 GbE network ports provide flexible connectivity options, enabling seamless integration into existing networks and easy upgrades to faster speeds when required.

Key features

• Pre-installed NAS-grade drives ensure reliable storage and immediate use out of the box.
• Quad-core processor combined with 8 GB DDR4 memory supports smooth multitasking and fast data access for multiple users.
• Flexible RAID options allow customization of data redundancy and performance to suit different project requirements.
• Dual 1 GbE and dual 10 GbE ports offer scalable network throughput, accommodating both standard and high-speed environments.
• Hardware-based AES-256 encryption protects sensitive data without impacting performance.
• Optional two-factor authentication adds an extra layer of security for administrative access.
• Cloud backup integration with Dropbox, Amazon S3, and Microsoft Azure provides reliable offsite data protection.
• Hot swappable drive bays enable drive replacement or upgrades without downtime, maintaining continuous access to data.

Key specs

• Storage capacity: 8 TB (two 4 TB NAS-grade drives pre-installed)
• Processor: 2.04 GHz quad-core
• Memory: 8 GB DDR4
• Drive bays: 4 (supports RAID 0, 1, 5, 6, 10, and JBOD)
• Network ports: Dual 1 GbE and dual 10 GbE
• Encryption: AES-256 hardware encryption

Connectivity and compatibility

The TS5420DN0802 offers versatile network connectivity with both gigabit and 10-gigabit Ethernet ports. This allows it to fit into a variety of network setups, from standard office environments to high-speed data centers. The NAS is compatible with common cloud storage services such as Dropbox, Amazon S3, and Microsoft Azure, enabling seamless backup and replication options for enhanced data security.

• Dual 1 GbE ports for standard network connections
• Dual 10 GbE ports for high-speed data transfer and future-proofing
• Cloud service integration for offsite backup and disaster recovery

Ideal uses and environments

This NAS server is well suited for creative studios managing large video or graphic files, branch offices requiring centralized backup solutions, and home enthusiasts who need fast, reliable storage for media streaming or virtual machines. Its combination of high capacity, flexible RAID options, and fast networking makes it a strong choice for environments where data accessibility, security, and uptime are critical.

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, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, 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. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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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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