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BUFFALO

BUFFALO TeraStation 3420DN 4-Bay SMB 16TB (4x4TB) Desktop NAS w/Hard Drives Included Network Attached Storage

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Availability: Only 2 left in stock, order soon!
Fulfilled by Consumer Supply Co
Arrives May 7 – May 11
Order within 11 hours and 22 minutes
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Features

  • 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. iSCSI support for server storage expansion.
  • Purpose-Built for Data Protection: Features 256-bit drive encryption, a closed system, and flexible replication and backup features to keep your data safe.
  • 16 TB Capacity 4 pre-tested, NAS-grade hard drives included. Ships in RAID 5 for 12 TB usable capacity; can change to RAID 6 for more redundancy, or RAID 0 for full 16 TB.
  • 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.

Digital Storage Capacity: 16 TB


Hard Disk Interface: Serial ATA-600


Connectivity Technology: Ethernet


Brand: BUFFALO


Special Feature: 16 TB Capacity – 4 pre-tested, NAS-grade hard drives included. Ships in RAID 5 for 12 TB usable capacity; can change to RAID 6 for more redundancy, or RAID 0 for full 16 TB. See more


Hard Disk Form Factor: 3.5 Inches


Hard Disk Description: 16TB (4x4TB)


Compatible Devices: Laptop, Desktop, Windows, Mac, Linux


Installation Type: Ethernet NAS Device


Color: black


Digital Storage Capacity: 16 TB


Hard Disk Interface: Serial ATA-600


Connectivity Technology: Ethernet


Additional Features: 16 TB Capacity – 4 pre-tested, NAS-grade hard drives included. Ships in RAID 5 for 12 TB usable capacity; can change to RAID 6 for more redundancy, or RAID 0 for full 16 TB.


Hard Disk Form Factor: 3.5 Inches


Compatible Devices: Laptop, Desktop, Windows, Mac, Linux


Read Speed: 225 Gigabits Per Second


Media Speed: 2.5 Gigabits Per Second


Cache Memory Installed Size: 16


Data Transfer Rate: 2.5 Gigabits Per Second


Form Factor: Desktop


Hardware Connectivity: SATA 6.0 Gb/s


Hard-Drive Size: 16 TB


Item Weight: 15.7 Pounds


Number of Items: 1


Unit Count: 1.0 Count


Brand: BUFFALO


Model Number: TS3420DN1604


Hard Disk Description: 16TB (4x4TB)


Built-In Media: 5e Ethernet Cable, AC Cable, Quick Setup Guide, TeraStation 3420DN, Warranty Statement


Model Name: TeraStation 3420DN


Manufacturer: BUFFALO


UPC: 747464134093


Item Type Name: TeraStation 3420DN


Warranty Description: 3-year Buffalo manufacturer's warranty


Installation Type: Ethernet NAS Device


Color: black


Enclosure Material: Metal


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 7 – May 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Best Bang For Your Buck for Small Business
Firstly, you get so much value with this item. I ordered the 4 drive 8TB (4X2TB drives) as a file server for my small business. The machine is made in Japan which gives me confidence in its quality, and although this NAS is small, it is hefty, solid and well built. Out of the box you don't get much by way of what to do with it. There is only a quick setup on how to plug it in, but nothing about what to do with it. Visit this site to get started. buffalotech.com/products/terastation-3020-series-desktop I used to help manage a large network years ago, and we installed Buffalo terrastations so I had some experience with them, but really, this unit is super easy to configure and is packed full of value added services such as links to popular cloud storage services, virus protection from TrendMicro, notifications, and several other enterprise level options. The unit comes preconfigured RAID 5 with options for RAID 5 + Hot Swap, and RAID 6 which I chose during setup. I'm a bit rusty with my tech knowledge, and this NAS was a breeze to setup. I highly recommend this product for small businesses and personal file storage use. I would not recommend it for enterprise use as it's missing some redundant features to prevent downtime. Overall, Ding Dong. ... show more
Reviewed in the United States on September 8, 2022 by M. Robles
    • Good back up unit
Capacity: 16TB (4x4TB) Style: Fully Populated
Been working fine. Little difficult tot install, but finally got it working. No failures yet.
Reviewed in the United States on December 13, 2025 by B-Rad
    • Solid SMB Hardware Backed by Incredible Support
Our team has been using the Buffalo TeraStation 3420DN for our IT system, and it is a workhorse. The 16TB capacity (shipped with drives included) made the initial deployment seamless, and the 2.5GbE port provides a noticeable boost in file transfer speeds for our office. What really sets Buffalo apart, though, is the support. I’ve been working with them for 5 years now, and Eric from tech support is hands-down the best. Every time I’ve called over the years, he has been incredibly helpful and knowledgeable. Knowing that level of support is available makes this an easy choice for any SMB looking for dependable storage. ... show more
Reviewed in the United States on April 9, 2026 by NYC360 INC.
    • One of the More Complicated NAS Devices
My photo/video file had exceeded the capacity of my computer's hard drive, so I purchased the Buffalo TeraStation to offload the pictures and videos. I also chose a NAS to allow my wife to access these files on my home LAN. The TeraStation setup is not for amateurs. Be prepared to read some complex manuals and call tech support a few times to get it working as you want. Also, be aware that the tech support guys are used to dealing with IT professionals (I think Buffalo products are more geared toward business applications than home use), and they lose patience with you quickly. On one support call, I gave one of their techs direct access to my computer. He started making changes right and left to the TeraStation setup and my computer without explaining what he was doing. It fixed my problem, but I had no idea how to fix it myself should it reoccur. When their techs get hold of a rookie, they want to fix the problem and move on to the next call. My biggest ongoing complaint is that you must reconnect the device to your network every time the computer restarts, be it from a power failure, reboot following a software update, or normal shutdown at the end of the day. It doesn't connect automatically. That's a problem when routines presume the device is always connected. For example, my Mac does backups on an external hard drive using a program called "Time Machine." I can store that backup on this device unless I am there to reconnect it whenever the computer is restarted. If you have a commercial application for a NAS, TeraStations are very reliable, but if it is for home use, I recommend you go a different way. ... show more
Reviewed in the United States on May 22, 2024 by Zenzation
    • Fast ship
Capacity: 16TB (4x4TB) Style: Fully Populated
Good plateform for onlline shipping ever
Reviewed in the United States on November 20, 2025 by Suwit Beathaisong
    • A very satisfied return customer
Capacity: 16TB (4x4TB) Style: Fully Populated
A worthwile upgrade over the TS3000 series of which I own 4. NAS response and throughput seems to be faster, but they did reduce available USB ports by 2 (compared to the TS3000). I imagine this might be an issue for anyone needing more than 2 attached USB drives. It came loaded with 4 ironwolf disks which was a pleasant and much appreciated surprise! The UI is more modern looking yet still familiar. Build quality is what I would call industrial-grade with robust and nicely finished metal chassis and disk trays. Even though my TS3000 units have been working flawlessly for years, they apparently don't receive software updates any more, which motivated me to start upgrading. I just hope Buffalo keeps these TS3040 units in support for a long time to come. ... show more
Reviewed in the United States on February 28, 2023 by rsky
    • Hope this lasts long like the old one
Capacity: 16TB (4x4TB) Style: Fully Populated
The raid finally died on my old terrastation I ran out of spare drives. I bought a couple of spares for this one. The old on lasted around 15 years 10 of those years has at a business with 50 users till we upgraded to a larger server.
Reviewed in the United States on July 20, 2025 by squaredancer

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