Buffalo TeraStation WS5420 IoT 16TB 4-Bay NAS Server (4 x 4TB)

Overview

The Buffalo WS5420DN16S9 is a four-bay network attached storage (NAS) server designed to provide 16TB of raw storage capacity with built-in data protection and seamless integration into Microsoft environments. Powered by a 1.5 GHz Intel Atom C3338 dual-core processor and equipped with 8GB of error-correcting DDR4 memory, it delivers responsive file services and supports lightweight virtual machines through its Hyper-V role. This NAS is ideal for small to medium businesses, creative studios, and branch offices that require reliable, high-speed storage with minimal maintenance.

Key features

• Pre-configured RAID 5 array offers immediate data redundancy to protect against drive failure without sacrificing storage capacity.
• Windows Server IoT 2019 operating system ensures compatibility with existing Microsoft networks, allowing easy integration with Active Directory and familiar management tools.
• 10-gigabit Ethernet port accelerates large file transfers and backup operations, reducing wait times for media and database workloads.
• Native support for Azure and OneDrive enables straightforward cloud synchronization and off-site backup without additional software.
• Built-in Hyper-V virtualization allows consolidation of lightweight server roles, reducing the need for extra hardware.
• Lockable front panel prevents unauthorized drive removal, enhancing physical security for sensitive data.
• Error-correcting memory guards against silent data corruption, maintaining data integrity over time.
• Subscription-free snapshot and replication tools simplify disaster recovery planning and data protection strategies.
• Three-year warranty combined with 24/7 US-based support and included data recovery service provides comprehensive peace of mind.

Key specs

• Storage capacity: 16TB (4 x 4TB NAS-grade drives)
• Processor: 1.5 GHz Intel Atom C3338 dual-core
• Memory: 8GB ECC DDR4
• RAID configuration: RAID 5 pre-configured
• Network interface: 10-gigabit Ethernet port
• Operating system: Windows Server IoT 2019
• Drive bays: 4
• Warranty: 3 years with 24/7 US-based support and data recovery service

Connectivity and compatibility

This NAS server fits well into environments that rely on Microsoft infrastructure, supporting Active Directory for user management and seamless file sharing. Its 10-gigabit Ethernet port ensures fast network connectivity, making it suitable for offices with high data throughput needs. The native integration with Azure and OneDrive allows easy cloud backup and synchronization, supporting hybrid storage strategies without requiring additional subscriptions or software.

Performance and reliability

The combination of an Intel Atom dual-core processor and 8GB of ECC DDR4 memory keeps file access smooth even under multiple simultaneous connections or when running lightweight virtual machines. The RAID 5 setup balances storage efficiency with fault tolerance, while error-correcting memory helps prevent silent data corruption. Physical security is enhanced by a lockable front panel, reducing the risk of accidental or malicious drive removal.

Ideal uses and environments

This NAS server is a strong choice for small and medium businesses looking to replace aging file servers with a modern, Windows-based solution. Creative studios managing large video or design asset libraries will benefit from the fast 10-gigabit network interface and reliable data protection. Branch offices needing a low-maintenance backup target will appreciate the familiar Windows Server interface and subscription-free cloud sync options. Overall, it suits users who want enterprise-grade features without complex setup or ongoing subscription costs.