Buffalo TS5420DN4002

Overview

The Buffalo TS5420DN4002 is a desktop network attached storage (NAS) server designed to centralize and protect large volumes of data for small offices, creative studios, and IT departments. It comes with two preinstalled 20 TB hard drives, providing a total of 40 TB of raw storage capacity right out of the box. Powered by a 2.04 GHz Annapurna Labs quad-core processor and 8 GB of DDR4 memory, it ensures smooth file transfers even when multiple users access large files simultaneously. This NAS supports a variety of RAID configurations and offers flexible network connectivity options, making it a versatile solution for data management and backup.

Key features

• Four hot swappable drive bays allow you to add or replace drives without powering down the system, minimizing downtime.
• Multiple RAID options (0, 1, 5, 6, 10, and JBOD) let you tailor the balance between speed, capacity, and data redundancy to fit your workflow.
• Dual 1 GbE ports plus a dedicated 10 GbE port provide flexible network configurations, including link aggregation for redundancy or separate networks for production and backup.
• Drive-level 256-bit encryption and optional two-factor authentication enhance data security and protect sensitive information.
• Snapshot backup technology captures point-in-time copies of your data, enabling quick recovery from accidental deletions or changes.
• Native cloud connectors support seamless replication to Dropbox, Amazon S3, Microsoft Azure, and OneDrive without requiring additional software.
• USB-A 3.2 Gen 1 and USB-A 2.0 ports allow connection of external storage devices, printers, or uninterruptible power supplies for expanded functionality.
• Browser-based management interface simplifies setup, RAID configuration, user permissions, and scheduled backups, making administration straightforward.

Key specs

• Storage capacity: 40 TB raw (2 x 20 TB preinstalled drives)
• Processor: Quad-core Annapurna Labs 2.04 GHz
• Memory: 8 GB DDR4
• Drive bays: 4 hot swappable
• Network ports: 1 x 10 GbE, 2 x 1 GbE
• USB ports: 2 x USB-A 3.2 Gen 1, 1 x USB-A 2.0
• RAID support: 0, 1, 5, 6, 10, JBOD
• Encryption: 256-bit drive-level

Connectivity and compatibility

This NAS server offers versatile connectivity options to fit into various network environments. The dedicated 10 GbE port supports high-speed data transfers, ideal for editing large media files or handling intensive backup tasks. The two 1 GbE ports can be configured for link aggregation to increase bandwidth or set up for network redundancy, ensuring continuous access to your data. USB ports expand the system’s capabilities by allowing external drives, printers, or UPS devices to connect directly.

• 10 Gigabit Ethernet port for high-speed network access
• Two Gigabit Ethernet ports for flexible network configurations
• USB-A 3.2 Gen 1 ports for fast external storage or peripherals
• USB-A 2.0 port for additional device support
• Cloud replication support for Dropbox, Amazon S3, Microsoft Azure, and OneDrive

Performance and reliability

The combination of a quad-core 2.04 GHz processor and 8 GB of DDR4 memory ensures the NAS handles multiple simultaneous file transfers without lag. Hot swappable bays allow maintenance or upgrades without interrupting service, which is critical for business continuity. RAID options provide flexibility to optimize for speed, capacity, or fault tolerance, while drive-level encryption and two-factor authentication protect your data from unauthorized access. Snapshot backups add an extra layer of data protection by enabling quick recovery from accidental file changes or deletions.

Ideal uses and environments

This NAS server fits well in environments where large amounts of data need to be shared, backed up, or archived reliably. It is a strong choice for architectural firms managing CAD files, creative studios handling 4K video projects, or IT departments requiring a secure and flexible file server. Its network options and cloud integration also make it suitable for distributed teams needing hybrid cloud workflows or off-site backups. The straightforward setup and management interface reduce the time and effort needed to deploy and maintain the system.

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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