Buffalo TeraStation 5420RN 16TB 4-Bay Windows IoT NAS Server (4 x 4TB)

Overview

The Buffalo WS5420RN16S9 is a network attached storage (NAS) server designed to provide reliable and high-capacity file storage for businesses. It comes with four 4 TB NAS-grade hard drives preconfigured in RAID 5, offering a total of 16 TB of storage with built-in data protection. Running Windows Server IoT 2019, it integrates seamlessly with Windows environments, making it easy to manage file shares, permissions, and cloud syncing using familiar tools. The system is powered by an Intel Atom C3338 processor and 8 GB of ECC DDR4 memory, ensuring smooth performance for file serving and backup tasks.

Key features

• Windows Server IoT 2019 enables integration with Active Directory, Azure, and OneDrive for streamlined management within existing Windows infrastructures.
• No Client Access Licenses required, allowing unlimited users or devices without additional licensing costs.
• High-speed network connectivity with one 10 Gigabit Ethernet port for fast data transfers and two 1 Gigabit Ethernet ports supporting link aggregation or network separation.
• Preconfigured RAID 5 setup on four NAS-grade 4 TB drives provides data protection out of the box, with options to reconfigure to RAID 6, RAID 10, or JBOD to suit evolving resilience needs.
• Hot-swappable drive bays allow maintenance or drive replacement without interrupting user access or server operation.
• Built-in snapshot, replication, and cloud synchronization features support comprehensive backup and disaster recovery strategies.
• Three-year warranty and 24/7 North America-based technical support ensure reliable assistance whenever needed.

Key specs

• Processor: Intel Atom C3338
• Memory: 8 GB ECC DDR4
• Storage: 16 TB total (4 x 4 TB NAS-grade drives)
• RAID configurations: RAID 5 (default), RAID 6, RAID 10, JBOD
• Network ports: 1 x 10 Gigabit Ethernet, 2 x 1 Gigabit Ethernet
• Operating system: Windows Server IoT 2019
• Drive bays: 4 hot-swappable
• Warranty: 3 years

Connectivity and compatibility

This NAS server offers flexible network options to fit various IT environments. The 10 Gigabit Ethernet port supports rapid file transfers, which is especially beneficial for teams handling large files such as high-resolution video or engineering data. The two additional 1 Gigabit Ethernet ports can be used for link aggregation to increase bandwidth or for network separation to enhance security. Its Windows Server IoT 2019 operating system ensures compatibility with Active Directory, Microsoft 365, and Azure services, allowing seamless integration into existing Windows-based networks without the need for additional client licenses.

Performance and reliability

The combination of an Intel Atom C3338 processor and 8 GB of ECC DDR4 memory delivers responsive performance for file serving and backup operations. ECC memory helps prevent data corruption, which is critical for maintaining data integrity in business environments. The preconfigured RAID 5 setup protects against drive failure, while options for RAID 6 and RAID 10 provide higher levels of redundancy if needed. Hot-swappable drives mean that maintenance can be performed without downtime, keeping your data accessible at all times.

Ideal uses and environments

This NAS server is well suited to small and medium-sized businesses that require a robust and scalable storage solution integrated with Windows infrastructure. It works well for creative teams managing large media files, IT departments running regular backups, and organizations leveraging Microsoft cloud services. Its flexible network ports and RAID options make it adaptable to various workflows and resilience requirements, supporting both primary file serving and disaster recovery roles.