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

The Buffalo WS5420DN16S9 is a four-bay network attached storage system that ships with 16TB of raw capacity and the Windows Server IoT 2019 operating system. Because it uses the same interface and management tools as a traditional Windows server, it drops into an existing Microsoft environment without extra training, and it can join Active Directory, share files, and sync with Azure or OneDrive right out of the box.

Inside the chassis you will find four NAS-grade 4TB drives that leave the factory in a RAID 5 array, so the unit arrives with data protection already in place. A 1.5 GHz Intel Atom C3338 processor and 8GB of error-correcting DDR4 memory keep file services responsive, even when several employees are pulling data at the same time or when lightweight virtual machines are running through the built-in Hyper-V role. When large media files or database backups need to move quickly, the 10-gigabit Ethernet port keeps transfer times short.

This platform suits small and medium businesses that are ready to retire aging file servers, creative studios that handle growing libraries of video or design assets, and branch offices that need a reliable backup target with minimal maintenance. Because it uses Windows Server, administrators can rely on familiar tools for user permissions, snapshots, and remote management, and they can replicate data to another TeraStation or to the cloud without a subscription.

Buffalo adds an extra layer of protection through a lockable front panel that prevents drive theft or accidental removal. Error-correcting memory guards against silent data corruption, while the three-year warranty, round-the-clock US-based support, and included data recovery service provide peace of mind if something goes wrong.

• 16TB total capacity delivered by four 4TB NAS-grade drives
• Ships with Windows Server IoT 2019 for seamless integration with existing Microsoft networks
• 1.5 GHz Intel Atom C3338 dual-core processor and 8GB ECC DDR4 memory support steady performance
• RAID 5 pre-configured for immediate data redundancy
• 10-gigabit Ethernet port accelerates large file transfers and backup jobs
• Native connectivity to Azure and OneDrive enables straightforward cloud sync and off-site backup
• Hyper-V virtualization allows consolidation of lightweight server roles without extra hardware
• Lockable front panel and enterprise security features help safeguard sensitive information
• Subscription-free snapshots and replication tools support disaster recovery planning
• Three-year warranty with 24 / 7 US-based support and data recovery service included