Reliable Storage w/ Effortless Setup: RAID 1 pre-configured for out-of-the-box protection to save you time and effort.
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The BUFFALO TeraStation 3420DN delivers professional-grade network storage without the enterprise complexity. This 4-bay NAS arrives pre-configured in RAID 1 with two 4TB NAS-grade drives, giving you 4TB of protected storage right out of the box. No technical expertise required—just plug it in and start storing.

What sets this apart is the combination of security and flexibility. You get 256-bit drive encryption, a closed system architecture that keeps threats out, and seamless cloud integration with Amazon S3, Dropbox, Azure, and OneDrive. The native 2.5GbE port delivers fast transfers without requiring expensive cable upgrades, while two empty bays let you expand capacity as your needs grow. Switch to RAID 0 if you need the full 8TB, or add more drives later.

Who Is This For?

This NAS is built for small businesses, creative professionals, and home users who need reliable centralized storage without IT staff. If you’re tired of juggling external drives, paying for cloud subscriptions, or worrying about data loss, the TeraStation gives you control. It’s ideal for photographers backing up shoots, small offices sharing files across teams, or families creating a private media server. The 3-year warranty with 24/7 US-based support and hard drive coverage means you’re not on your own if something goes wrong.

Bottom Line

The BUFFALO TeraStation 3420DN removes the guesswork from network storage. You get enterprise-level protection, expandability, and support in a package designed for real-world use. Made in Japan with quality components, it’s a long-term investment in keeping your data safe and accessible. For anyone serious about data protection without the complexity, this NAS delivers.

  • Professional Grade Network Attached Storage: Optimized to organize, store, share, and back up your important files.
  • Reliable Storage w/ Effortless Setup: RAID 1 pre-configured for out-of-the-box protection to save you time and effort.
  • Purpose-Built for Data Protection: Features 256-bit drive encryption, a closed system, and flexible replication and backup features to keep your data safe.
  • Cloud Integration: Sync with Amazon S3, Dropbox, Azure and OneDrive to create a hybrid cloud for extra data security, cost savings, and flexible scalability.
  • 8 TB Capacity – 2 pre-tested, NAS-grade hard drives included. Ships in RAID 1 for 4 TB usable capacity; can change to RAID 0 for full 8 TB; 2 empty bays for future expansion.
  • Peace of Mind Included: 3-year warranty (includes hard drive coverage) with 24/7, award-winning US-based support. (Additional warranty options available.)
  • Made in Japan – Quality made data storage.
  • Fast Data Transfers: Native 2.5GbE port for high speeds with no cable upgrade needed.
  • Remote Management Service: Save time and resources by managing multiple NAS from a single console.
  • Data Recovery Service: Qualifies for free simple logical data recovery with award winning support when registered.