Buffalo TeraStation WS5420 IoT 8TB 4-Bay NAS Server (4 x 2TB)

Overview

The Buffalo WS5420DN08S9 is an 8TB network attached storage (NAS) server designed to integrate seamlessly into Windows-based networks using Windows Server IoT 2019. It comes pre-configured with four 2TB enterprise-grade drives in a RAID 5 array, providing both ample storage and built-in redundancy from the start. Powered by a 1.5 GHz Intel Atom C3338 dual-core processor and 8 GB of ECC DDR4 memory, this NAS delivers responsive file sharing and supports advanced features like data deduplication and scheduled Shadow Copy snapshots without impacting daily operations.

Its robust design supports continuous 24/7 operation, making it well suited for environments such as creative studios managing large media libraries, branch offices requiring reliable backup targets, or security setups storing constant camera footage. The lockable front panel and server-class components enhance security and uptime, while integrated Windows features simplify data protection and management.

Key features

• Pre-installed RAID 5 array with four 2TB drives offers immediate data redundancy and usable capacity.
• Runs Windows Server IoT 2019 for native compatibility with Active Directory, Azure, and OneDrive, enabling hybrid cloud workflows without extra software learning.
• 1.5 GHz dual-core Intel Atom processor combined with 8 GB ECC DDR4 memory ensures stable and efficient file sharing performance.
• Includes a 10 GbE port for high-speed network backbones plus two Gigabit Ethernet ports for flexible link aggregation or failover configurations.
• Supports Windows Storage Spaces, BitLocker encryption, and policy-based backups to create layered data protection strategies.
• Hot-swappable drive bays allow easy maintenance and drive replacement without downtime.
• Lockable front panel deters unauthorized access, enhancing physical security.
• Designed for continuous operation with server-grade hardware to maintain reliability around the clock.
• Backed by a three-year warranty and 24/7 North America-based technical support for long-term peace of mind.

Key specs

• Total storage capacity: 8 TB (4 x 2 TB drives)
• Processor: Intel Atom C3338 dual-core 1.5 GHz
• Memory: 8 GB ECC DDR4
• Operating system: Windows Server IoT 2019
• Network interfaces: 1 x 10 GbE port, 2 x Gigabit Ethernet ports
• RAID configuration: RAID 5 pre-configured
• Drive bays: 4 hot-swappable
• Physical security: Lockable front panel

Connectivity and compatibility

This NAS server offers versatile network connectivity options to fit various infrastructure needs. The built-in 10 GbE port supports fast data transfers suitable for high-demand environments, while the two additional Gigabit Ethernet ports provide options for link aggregation to increase bandwidth or failover to maintain network availability. Its Windows Server IoT 2019 operating system ensures smooth integration with existing Windows networks, including Active Directory for user management and Azure or OneDrive for hybrid cloud storage workflows.

Ideal uses and environments

The WS5420DN08S9 is a strong choice for small to medium-sized offices that require reliable, always-on access to shared files with built-in data protection. Creative professionals managing large media files will benefit from its high-speed networking and stable performance. Branch offices can use it as a dependable backup target, while security teams can store continuous camera footage securely. Its design supports 24/7 operation, making it suitable for any setting where uptime and data integrity are critical.