Buffalo TeraStation 5420DN 16TB 4-Bay Desktop NAS Server

The Buffalo TS5420DN1604 is a four-bay desktop NAS that ships with four 4 TB NAS-grade hard drives, giving you 16 TB of raw capacity the moment you power it on. The drives come preconfigured in a RAID array, so your data begins life with an extra layer of protection instead of an empty volume.

Inside the chassis, a 2.04 GHz Annapurna Labs AL524 processor works alongside 8 GB of DDR4 memory. This combination keeps file transfers smooth for a busy office, and it also supports light virtualization tasks when you need to test a virtual machine or run a small production workload.

Dual 10 GbE ports sit next to a pair of 1 GbE ports on the back panel. You can plug straight into a 10 gig switch for fast backups and video edits, or fall back to standard gigabit when the rest of the network still runs at that speed. Link aggregation and failover options add another layer of flexibility.

Data security does not end with RAID. Built-in AES-256 encryption protects files at rest, and optional two-factor authentication helps keep unwanted logins at bay. If a drive ever fails, the hot-swap design lets you replace it without shutting the system down, so colleagues keep working while the array rebuilds.

The unit fits neatly into a modern backup strategy. It speaks to VMware ESXi and Microsoft Hyper-V for virtual machine storage, and it syncs with Dropbox, Amazon S3, and Microsoft Azure for off-site copies. That range of options makes it a practical choice for IT administrators, creative teams that juggle large media files, and any small to medium office that wants enterprise-style features without a rack.

• 16 TB capacity delivered by four 4 TB NAS hard drives
• Dual 10 GbE plus 1 GbE network ports for fast transfer and flexible connectivity
• Supports RAID 0, 1, 5, 6, 10, and JBOD
• Hot-swappable drive bays allow replacement and upgrades without downtime
• AES-256 encryption and optional two-factor authentication enhance security
• Compatible with VMware ESXi and Microsoft Hyper-V
• Integrates with Dropbox, Amazon S3, and Microsoft Azure for cloud backup