Buffalo OP-HD4.0BST-3Y

Overview

The Buffalo OP-HD4.0BST-3Y is a 4TB internal hard drive designed to replace or expand storage within Buffalo LinkStation and TeraStation NAS enclosures. It features a SATA 3 Gb/s interface that supports smooth data transfer, making it suitable for streaming large media files, backing up workstations, and sharing files across teams without performance interruptions. Its hot-swap capability allows for easy installation or replacement without shutting down the NAS, ensuring continuous access to your data.

Key features

• 4TB capacity provides ample space for growing media libraries, backups, and shared files.
• SATA 3 Gb/s interface ensures consistent and reliable network performance for everyday tasks.
• Hot-swap design enables drive replacement or addition without interrupting NAS operation.
• Specifically engineered for seamless compatibility with Buffalo LinkStation and TeraStation models.
• Supports maintaining RAID arrays without requiring a full rebuild or system downtime.

Key specs

• Capacity: 4TB
• Interface: SATA 3 Gb/s
• Compatibility: Buffalo LinkStation 220, 420, 720; TeraStation TS1200D, TS1400D
• Drive type: Internal hard drive for NAS enclosures

Compatibility and reliability

This drive is guaranteed to work with specific Buffalo NAS models, including LinkStation 220, 420, and 720, as well as TeraStation TS1200D and TS1400D. Its design matches the original hardware specifications, ensuring reliable operation and preserving the integrity of your RAID configurations. The hot-swap feature minimizes downtime, which is critical for environments where continuous access to data is essential.

Ideal uses and environments

The OP-HD4.0BST-3Y fits well in small office setups, home media servers, and creative workgroups that rely on Buffalo NAS devices for centralized storage. It supports streaming high-capacity media files, backing up multiple workstations, and sharing project files efficiently. Users who need to expand storage or replace failed drives without disrupting network access will find this drive a practical and dependable choice.

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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