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BUFFALO LinkStation 420 4 TB 2-Drive (2 x 2 TB) High Performance RAID NAS Personal Cloud Storage and Media Server - LS420D0402

  • 2-Bay
  • 4TB (2 x 2TB)
  • 1 x 10/100/1000M
  • 1 x USB2.0
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Learn more about the Buffalo Technology LinkStation 420 (LS420D0402)


LinkStation 420 (LS420D0402)
IEEE 802.3, IEEE 802.3u, IEEE 802.3ab


Port RJ-45
1 x 10/100/1000M
Port USB
1 x USB2.0
HDD Interface
2 x SATA (2 x Bay)


Form Factor

Hard Drive Performance

Included HDD Capacity
4TB (2 x 2TB)
RAID 0/1/JBOD (Individual Disks)


Supported Protocols


Internal AC 100-240V Universal, 50/60 Hz


Buffalo's LinkStation 420 network storage provides ultra fast shared storage and backup for all PC and Mac computers on your home network with the security of RAID data protection.

Simply connect it to your wireless router for access anywhere in your home.

Equipped with a high performance processor, LinkStation 420 boasts transfer speeds up to 80 MB/s, twice as fast as a standard NAS or USB drive. Additionally, it's DLNA Certified and it can be used as an iTunes server for simplified media storage and streaming. While on the go, easy to use WebAccess service allows you to create a free personal cloud for easy remote access anytime, anywhere over the Internet, and even on your iPhone, iPad and Android devices.

With LinkStation 420, you can back up multiple computers simultaneously and enjoy uninterrupted access to terabytes of storage anytime, anywere.


20-80% Humidity (non-condensing)

Package Contents

Package Contents
LinkStation 420, Setup CD-ROM, Quick Setup Guide, Ethernet Cable, AC Adapter, AC Cable

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Buffalo Technology LinkStation 420 (LS420D0402)

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  • David G.
  • 4/4/2014 2:58:42 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsWorked for almost 4 hours!

This review is from: BUFFALO LinkStation 420 4 TB 2-Drive (2 x 2 TB) High Performance RAID NAS Personal Cloud Storage and Media Server - LS420D0402

Pros: Nice simple design. Nice option set. Not a horrible interface. Tech support was pleasant and answered quickly.

Cons: Set it up and started transferring files. 3.5 hours later it transfer stopped and lights on front of unit indicated firmware corrupted.

Call Buffalo support. Seems like nice people. Followed their recommendation to update the firmware. Still got blinking light. Interestingly enough, could still see device and access was restored, but firmware corrupt lights kept blinking, so....

Followed their recommendation to update firmware again and also wipe the unit. After that, the device was no longer discoverable and is a brick.

Did you find this review helpful? Yes No

  • John T.
  • 4/3/2014 9:22:48 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsBuffalo LS420D0402

This review is from: BUFFALO LinkStation 420 4 TB 2-Drive (2 x 2 TB) High Performance RAID NAS Personal Cloud Storage and Media Server - LS420D0402

Pros: Small and compact, large storage space, good price for amount of storage.

Cons: After 4 days of trying to get it working and pulling my hair out, I now have a tech service trying to figure out why it won't connect and they are not having any luck getting it working for me either. Have tried contacting Buffalo support with no responses. Instruction are very minimal and very basic. After spending a month deciding on which product to buy, I find out after buying it that it is NOT compatable wilth an AT&T U-Verse router, never saw any information about that on any info pages on it. I can't imagine I'm the only person with U-verse who has had this problem and it's not covered on any info page. Right now I have an expensive useless item setting on my computer desk. Be aware, if you have U-Verse, stay away from Buffalo drives.

Did you find this review helpful? Yes No

  • Peter P.
  • 10/23/2013 10:35:09 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsLS420D0402

This review is from: BUFFALO LinkStation 420 4 TB 2-Drive (2 x 2 TB) High Performance RAID NAS Personal Cloud Storage and Media Server - LS420D0402

Pros: The Buffalo NAS is fast, quiet, has a small footprint, and a large cache(512MB). Once you have it working, you can forget about. It is just there anytime you want to access it.

Cons: Documentation could be better. I have given an overall description below of how this NAS is works.

Other Thoughts: You can choose to configure this NAS in one of several ways. I chose to configure it as a RAID 1. I did this because I have several thousand photographs that I want to protect and share, and as a RAID 1 array, I have complete backup in case of a drive failure. You will create an IP address on the NAS for your local network, then you must configure your router to forward uPnP port 9000 to get on the internet. After you get the NAS on the internet, you can go to Buffalo's web site and create an id. for your NAS. Once this is done, you can go to your Apple or Android store and download a free ap. for your remote device and you are done. You can configure the NAS to only allow RO, RW, etc. any of your pictures, music, or documents you wish to share.

I am a retired network engineer and I would recommend you either have some computer networking experience or know a friend who does to insure a successful installation.

4 out of 4 people found this review helpful. Did you? Yes No

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