How to recover data from Buffalo TeraStation TS3420RN0802 NAS

Is your network drive gone, and you are wondering what to do? Has a RAID system crashed, and your files are no longer accessible? Does your device display an error while booting? Have you accidentally rebuilt your RAID system? Are several hard disks out of order?

How to recover data from NAS Buffalo TeraStation TS3420RN0802

Buffalo TeraStation TS3420RN0802 NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from TeraStation TS3420RN0802.

How to recover data from NAS Buffalo TeraStation TS3420RN0802

Recover data from damaged RAID arrays inaccessible from a computer.

Why can’t ordinary software tools restore files from RAID?

Conventional hard disks keep user’s data by writing it to their surface in a consecutive way, and this is how an entire file is stored on a single hard disk. However, when data is written to a RAID system, a file is divided into several parts. Then these parts are written consecutively to all hard disks within such array. The size of such parts may range from 2 KB to 2 MB, so each file is stored on several hard disks at the same time.

Such approach helps to speed up read and write operations, and it is evident that saving two parts of a file having the size of 1 GB to two hard disks simultaneously is much faster than saving the same 1 GB of data to one hard disk. However, this peculiarity makes file recovery more complicated.

Various RAID levels store information in different ways. Additionally, manufacturers like Buffalo also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.

Are there any guidelines for configuring security settings on NAS Buffalo TeraStation TS3420RN0802 devices to prevent unauthorized access and potential data loss?

Yes, there are several guidelines you can follow to configure security settings on NAS Buffalo TeraStation TS3420RN0802 devices to prevent unauthorized access and potential data loss. Here are some recommendations:

  1. Change default passwords: Immediately change the default administrative password to a strong and unique one. Also, consider changing the default username if possible.
  2. Enable firewall: Activate the built-in firewall on the TeraStation to restrict access to only necessary services and ports. Configure the firewall rules according to your requirements.
  3. Disable unnecessary services: Disable any unnecessary services or protocols that are not required for your specific use case. This reduces the attack surface and minimizes potential vulnerabilities.
  4. Regularly update firmware: Keep the TeraStation's firmware up to date with the latest security patches and bug fixes. Check Buffalo's support website regularly for firmware updates and apply them as soon as they become available.
  5. Implement access controls: Utilize the NAS's built-in access control features to restrict access to specific users or groups. Set appropriate permissions for each user/group to ensure they only have access to the necessary files and folders.
  6. Enable encryption: Enable encryption on the TeraStation to protect data at rest. This ensures that even if the physical device is stolen, the data remains encrypted and inaccessible to unauthorized individuals.
  7. Implement strong network security: Secure the network on which the TeraStation is connected. Use strong Wi-Fi encryption (WPA2 or higher) and consider segmenting the network to isolate the NAS from other devices.
  8. Regularly backup data: Implement a regular backup strategy to ensure that critical data is backed up and can be restored in case of data loss or ransomware attacks. Store backups on a separate device or in the cloud.
  9. Monitor and log activities: Enable logging and monitoring features on the TeraStation to keep track of any suspicious activities or unauthorized access attempts. Regularly review the logs to detect any potential security incidents.
  10. Educate users: Provide training and awareness to users on best practices for accessing and using the TeraStation securely. Teach them about password hygiene, phishing attacks, and other common security threats.

Remember, security is an ongoing process, and it is recommended to regularly review and update the security settings on your TeraStation to adapt to evolving threats and best practices.

How to take hard disks out of the NAS and connect them to a PC?

Although NAS TeraStation TS3420RN0802 can be accessed over the network, you still need to take the hard disks out of the storage device and connect them to a Windows computer. Only in this case will the software be able to scan them properly. Here is what you should do:

  1. Turn off the storage and disconnect it from the power supply.

    WARNING! Before you start taking hard disks out of your NAS device, read the manual carefully. Incorrect actions may damage your network-attached storage and/or the hard disks within the RAID system.

  2. Take the hard disks out of the NAS one by one, carefully removing them from their slots. Remember that the disks are extremely vulnerable: hitting or dropping them may result in serious physical damage.

  3. Make sure to mark each hard disk in accordance with how they were installed inside the NAS.

  4. Remove the hard disks and connect them to the computer. In this video, we have explored what ports are used to connect hard disks, and what to do if there are not enough ports or connectors.

    Go to view
    How to Order Remote Data Recovery

    How to Order Remote Data Recovery

Restoring data with Hetman RAID Recovery

Hetman Raid Recovery

This program recovers data from damaged RAID arrays and is fully compatible with Buffalo TeraStation TS3420RN0802. The hard disks that make up the RAID contain technical information about the algorithm used to save files. When launched, Hetman RAID Recovery reads this information and puts the damaged array together. Then you can open the disk and save your files. Also, you can recover the files accidentally deleted from the network drive.

Go to view
How to recover data from a Buffalo

How to recover data from a Buffalo

TeraStation TS3420RN0802 has 2 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • JBOD;

NAS supports:

  • exFAT, VFAT, FAT 12 / 16 / 32;
  • NTFS / ReFS;
  • APFS / HFS+;
  • Ext2 / 3 / 4 / ReiserFS / XFS / UFS / ZFS / Btrfs;
  • VMFS / HikvisionFS;

Safe recovery from disk images

This utility lets you save an entire copy of the disk to file and then work with this image instead of the actual disk. Such feature helps to protect data on the disk from:

  • Overwriting during the recovery process;
  • Loss resulting from bad sectors;
  • User mistakes.

To create an image, do the following:

  1. Make sure that you have enough free space to save the image. The image file size usually equals the disk size.

  2. Select the disk in the main window, and choose from the menu ToolsSave Disk. You can select multiple disks to be saved.

  3. When the image creation wizard starts, you can choose to save the entire disk or select only a part of it. Specify the parameters and click Next.

    Hetman Raid Recovery: Image Creation Wizard
  4. At this stage, you need to choose a directory where to save the image. Choose any disk connected to this PC, or save the image by FTP.

    Hetman Raid Recovery: hoose any disk connected to this PC, or save the image by FTP

Where are user’s files stored?

The Buffalo TeraStation TS3420RN0802 network-attached storage keeps OS Linux operating system files on a separate RAID 1 (mirrored) array. Usually, all NAS systems create several volumes on every hard disk, and the first of them takes up to 2 Gb of space. This is where operating system files are stored. Other volumes are united into a RAID array where user’s data is written.

Comparison of software for RAID recovery

Product Operating system License type RAID controller support Supported file systems Virtual RAID controller support Data recovery from damaged RAID File preview
Hetman RAID Recovery Windows Paid Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
DiskInternals RAID Recovery Windows Paid Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
R-Studio Windows, Mac, Linux Paid Yes, over 200 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
UFS Explorer RAID Recovery Windows, Mac, Linux Paid Yes, over 1,000 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
EaseUS Data Recovery Windows Paid Yes, over 20 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
ReclaiMe Free RAID Recovery Windows Free Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes


We will be happy to answer your questions!

Comments (3)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 9.08.2022 12:31 #
    If you want to ask a question about data recovery, from NAS TeraStation TS3420RN0802, feel free to leave a comment!
  • Jamie Burridge
    Jamie Burridge 1.09.2023 19:53 #
    Can data recovery from a NAS Buffalo TeraStation TS3420RN0802 device be done remotely?
    • Hetman Software
      Hetman Software 1.09.2023 20:59 #

      Yes, data recovery from a Buffalo TeraStation TS3420RN0802 device can potentially be done remotely, depending on the specific circumstances and the capabilities of the device.

      If the NAS device is still accessible over the network and the data loss is due to logical issues (such as accidental deletion or file system corruption), it may be possible to remotely connect to the device and perform data recovery operations.

      However, if the data loss is due to physical issues with the NAS device's hardware (such as a failed hard drive or RAID controller), remote data recovery may not be feasible. In such cases, it is usually necessary to physically access the device and perform the recovery process on-site or send the device to a professional data recovery service.

      It is recommended to consult with a professional data recovery service provider to assess the specific situation and determine the best course of action for recovering the data from the Buffalo TeraStation NAS device.

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Vladimir Artiukh

Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Oleg Afonin

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.


Questions and answers

  • What are the key network settings that need to be configured on the Buffalo TeraStation TS3420RN0802 for optimal performance and connectivity?

    To ensure optimal performance and connectivity on the Buffalo TeraStation TS3420RN0802, the following key network settings should be configured:

    1. IP Address: Assign a static IP address to the TeraStation within your network's subnet. This ensures that the device always has a consistent address for communication.
    2. Subnet Mask: Set the subnet mask to match your network's configuration. This defines the range of IP addresses that are considered part of the local network.
    3. Default Gateway: Specify the IP address of your network's default gateway. This is typically the IP address of your router and allows the TeraStation to communicate with devices outside of the local network.
    4. DNS Servers: Enter the IP addresses of your network's DNS servers. These servers are responsible for translating domain names into IP addresses, enabling internet connectivity and name resolution.
    5. Network Speed and Duplex: Configure the network speed and duplex settings to match your network infrastructure. It is recommended to set this to Auto-negotiation, which allows the TeraStation to automatically determine the best speed and duplex settings based on the connected network device.
    6. Jumbo Frame: If your network supports jumbo frames, enable this option on the TeraStation. Jumbo frames increase the maximum packet size, which can improve data transfer speeds for large files.
    7. Port Trunking: If your network has multiple network interfaces on the TeraStation and supports link aggregation (port trunking), you can configure this feature to increase network bandwidth and redundancy.
    8. VLAN: If your network utilizes VLANs (Virtual Local Area Networks), configure the appropriate VLAN settings on the TeraStation to ensure proper network segmentation and communication.
    9. Network Time Protocol (NTP): Set the NTP server address to synchronize the TeraStation's internal clock with an accurate time source. This is important for various network operations and time-based functions.
    10. Firewall and Security: Configure any necessary firewall rules or security settings to allow the TeraStation to communicate with other devices on the network while maintaining appropriate security measures.

    It is recommended to consult the Buffalo TeraStation TS3420RN0802's user manual or the manufacturer's support documentation for detailed instructions on configuring these settings specific to your network environment.

  • How can I set up user access and permissions on the Buffalo TeraStation TS3420RN0802 to ensure secure data sharing within my network?

    To set up user access and permissions on the Buffalo TeraStation TS3420RN0802 for secure data sharing within your network, follow these steps:

    1. Access the TeraStation's web interface by entering its IP address in a web browser.
    2. Login with the administrator credentials.
    3. Navigate to the "Shared Folders" section.
    4. Create a new shared folder or select an existing one to modify its permissions.
    5. Click on the "Access Restrictions" tab.
    6. Click on the "Add" button to create a new access restriction.
    7. Enter a name for the access restriction and select the desired group or user from the dropdown menu.
    8. Choose the desired access permissions for the selected group or user (e.g., read-only, read-write, no access).
    9. Repeat steps 6-8 for all groups or users you want to set access restrictions for.
    10. After setting up the access restrictions, click on the "Apply" button to save the changes.
    11. You can also set up user accounts and groups under the "Users" section to manage access permissions more efficiently.
    12. Navigate to the "Users" section and click on the "Add" button to create a new user account.
    13. Enter the required information for the user account, such as username, password, and email address.
    14. Assign the user to the appropriate groups by selecting them from the "Groups" dropdown menu.
    15. Set the desired access permissions for the user by checking the appropriate boxes (e.g., read-only, read-write).
    16. Click on the "Apply" button to save the user account.
    17. Repeat steps 12-16 for all users you want to create.

    By following these steps, you can set up user access and permissions on the Buffalo TeraStation TS3420RN0802 to ensure secure data sharing within your network.

  • Are there any specific settings or configurations that need to be adjusted on the Buffalo TeraStation TS3420RN0802 to enable remote access and file sharing over the internet?

    Yes, there are specific settings and configurations that need to be adjusted on the Buffalo TeraStation TS3420RN0802 to enable remote access and file sharing over the internet. Here are the steps to set it up:

    1. Connect the TeraStation to your network and power it on.
    2. Access the TeraStation's web-based configuration interface by opening a web browser and entering the TeraStation's IP address.
    3. Log in to the web interface using the administrator credentials.
    4. In the web interface, navigate to the "Settings" or "Configuration" section.
    5. Look for an option related to remote access or remote management. It may be called "Remote Web Access" or "Remote Access Service."
    6. Enable remote access by checking the appropriate box or selecting "Enable."
    7. Configure the necessary network settings, such as port forwarding or setting up a VPN (Virtual Private Network) if required by your network setup.
    8. Set up user accounts and permissions for remote access and file sharing. You may need to create new user accounts or modify existing ones to allow remote access.
    9. Save the settings and apply the changes.
    10. Test the remote access by accessing the TeraStation from a different network or location using the provided remote access URL or IP address.

    Note: The exact steps and options may vary slightly depending on the firmware version of your TeraStation. It is recommended to refer to the TeraStation's user manual or consult Buffalo's support documentation for specific instructions related to your model.

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