BUFFALO TeraStation WS5420 4-Bay Rackmount NAS with Windows Server IoT 2019 and 40TB Drives Included

The BUFFALO TeraStation WS5420 is a purpose-built 4-bay rackmount NAS designed to meet the storage, backup, and collaboration needs of small businesses, branches, and professional workgroups. With a total of 40TB of pre-installed storage, this system provides immediate capacity for file sharing, media libraries, active projects, and centralized backups. Running Windows Server IoT 2019 Standard, it combines familiar management tools with streamlined data protection, making it an ideal centerpiece for teams that require reliable, secure, and scalable network storage.

Engineered for 24/7 operation, the WS5420 delivers robust performance in a compact 2U chassis. The four hot-swappable bays simplify maintenance and minimize downtime, while the built-in hardware features are tuned for dependable access to documents, spreadsheets, design files, and multimedia across your network. Whether you’re archiving archives, distributing large files to multiple departments, or safeguarding critical backups, this system is built to handle it with efficiency and resilience.

With flexible RAID options and enterprise-grade reliability, the TeraStation WS5420 gives administrators precise control over data protection. The unit supports common RAID configurations to balance performance, redundancy, and capacity. Its Windows Server IoT 2019 Standard foundation provides a familiar interface for IT staff and users alike, enabling straightforward setup, granular permissions, and centralized management. The result is a storage appliance that not only stores data but also helps you protect, organize, and recover it quickly when needed.

Networking is at the core of a productive NAS deployment, and the WS5420 is engineered to meet the demands of small teams. Dual network connectivity supports link aggregation or redundancy, improving throughput and uptime in busy offices or small data centers. The device integrates seamlessly with Windows clients and supports common file-sharing protocols, making it easier for employees to map drives, access shared folders, and collaborate on projects. In addition, Buffalo’s focus on reliability extends to energy efficiency, quiet operation, and a compact footprint suitable for rack rows or dedicated storage rooms.

For teams that want to begin right away, the WS5420’s out-of-the-box configuration translates to fast time-to-value. Pre-installed drives provide immediate access to data storage, while the Windows Server IoT 2019 Standard environment supports essential services such as user authentication, file services, backups, and simple application hosting. As needs grow, this NAS scales with additional storage capacity, improved redundancy, and expanded network capabilities, all while maintaining an approachable management experience for IT professionals and end users alike.

• 4-bay rackmount NAS with 40TB total pre-installed storage (4x10TB drives) for immediate capacity and streamlined deployment.
• Windows Server IoT 2019 Standard installed, delivering familiar server management, file services, and backup capabilities in a compact NAS package.
• Flexible RAID support and hot-swappable drive bays for reliable protection and minimal downtime during maintenance or upgrades.
• Dual Gigabit Ethernet connectivity with robust network services, enabling faster data transfer, better load balancing, and enhanced uptime for business workflows.
• User-friendly web-based management, scalable storage options, and broad compatibility with Windows, Mac, and Linux clients for seamless collaboration.

Technical Details of BUFFALO TeraStation WS5420

• Bays: 4 hot-swappable drive bays
• Total storage: 40TB (pre-installed) – 4 x 10TB drives
• Operating system: Windows Server IoT 2019 Standard
• Form factor: 2U rackmount NAS chassis
• Network interfaces: 2 x Gigabit Ethernet ports
• Storage architecture: supports common RAID configurations (vary by SKU); designed for reliable data protection and uptime
• Management: web-based administration interface with familiar Windows-style file sharing and backup options
• File sharing and protocols: optimized for standard network file sharing across Windows, Mac, and Linux environments
• Expansion and compatibility: expandable storage options and compatibility with standard networked storage practices within SMB environments
• Notes: Specifications may vary by SKU; always consult the official spec sheet for precise details

How to install BUFFALO TeraStation WS5420

• Unpack and place the WS5420 in a suitable rack location, ensuring adequate ventilation and access to power and network connections.
• Install the unit into a rack or secure it on a stable chassis, then connect the double-powered or standard power supply to a reliable power source.
• Connect the NAS to your network via the included Ethernet ports. If you plan to use link aggregation or redundancy, configure the network ports accordingly on your switch.
• Power on the device and access the web-based management interface from a computer on the same network. Use the provided default credentials to sign in and begin the initial setup wizard.
• Configure storage and user access: set up RAID and volumes, create user and group permissions, enable essential services (file shares, backups, and access controls), and establish any required firewall or security settings. Create shared folders and assign appropriate access controls for departments or teams.
• Set up backups and disaster recovery: configure automated backups to local or remote destinations, schedule regular backups for critical data, and verify restore procedures to ensure data integrity.
• Test access from client devices, map network drives, and confirm that file sharing, media streaming, and backups operate as expected. Document configurations for IT staff and end users to minimize support needs.

Frequently asked questions

• Q: What exactly is included with the 40TB of storage?
  A: The unit ships with four 10TB drives installed, totaling 40TB of usable capacity. The exact usable space depends on the RAID configuration you choose.
• Q: What operating system does this NAS use?
  A: It runs Windows Server IoT 2019 Standard, offering familiar server features for file sharing, data protection, and basic application hosting.
• Q: How many drives can I mix in the future?
  A: The WS5420 is a 4-bay chassis designed for hot-swappable drives. You can replace drives or upgrade to higher-capacity drives within those four bays; expansion beyond four bays would require a separate storage enclosure or expansion solution compatible with the device.
• Q: Can I install this NAS in a small office or home office?
  A: Yes. The 2U rackmount design fits in standard server rooms or storage closets, and the Windows-based management makes administration approachable for IT personnel and experienced users alike.
• Q: What kind of network performance can I expect?
  A: With dual Gigabit Ethernet ports, the WS5420 supports reliable network throughput for shared folders, backups, and streaming. Performance varies with RAID configuration, drive speeds, and network conditions.
• Q: Is this suitable for business backups?
  A: Yes. The combination of RAID options, Windows Server IoT 2019 Standard features, and centralized storage makes it well-suited for routine backups, versioning, and recovery operations for small teams.