.NSF File Recovery

Have files been deleted due to a user’s error or software error? Have you formatted a disk by accident and need to know how to recover the files? Read our .NSF file recovery guide for Windows, MacOS, Android and IOS in 2023.

NSF File Recovery

What is a .NSF file?

Music file from an original Nintendo (NES/Famicom) game; allows music from Nintendo games to be played without loading the actual game; can be opened by a variety of NSF players.

What Are Common Causes of ".NSF" Files Lost or Failure?

There are several common causes of ".NSF" (Notes Storage Facility) files lost or failure:

  1. Accidental deletion: Users may accidentally delete ".NSF" files while performing file management tasks, such as cleaning up their computer or emptying the recycle bin.
  2. Hardware or software failure: Hardware issues, such as hard drive failure or corruption, can lead to ".NSF" file loss. Similarly, software issues, such as operating system crashes or software conflicts, can cause ".NSF" files to become inaccessible or corrupt.
  3. Virus or malware attacks: Malicious software can infect ".NSF" files and corrupt or delete them. Ransomware attacks can also encrypt ".NSF" files and demand a ransom for their recovery.
  4. Power outages or improper system shutdown: Unexpected power outages or improper shutdown of the system while working with ".NSF" files can result in file corruption or loss.
  5. File system errors: File system errors, such as file system corruption or bad sectors on the hard drive, can cause ".NSF" files to become inaccessible or lost.
  6. Synchronization issues: If ".NSF" files are synchronized with other devices or servers, synchronization errors can occur, leading to file loss or corruption.
  7. Human errors: Accidental overwriting, moving, or renaming of ".NSF" files can result in their loss or failure.
  8. Upgrading or migrating data: During the process of upgrading or migrating data from one system to another, there is a risk of ".NSF" file loss or corruption if not done properly.

It is important to regularly back up ".NSF" files to prevent data loss and use reliable data recovery tools or services in case of file failure.

How to recover lost ".NSF" files?

Sometimes while working with a computer, laptop or other stationary or mobile devices, you may encounter various bugs, freezes, hardware or software failures, even in spite of regular updates and junk cleaning. As a result, an important ".NSF" file may be deleted.

Go to view
🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

By no means should you think that the only way to recover a ".NSF" file is always to create it once more.

Use programs for recovering ".NSF" files if a file was lost after accidental or deliberate deleting, formatting the memory card or the internal storage, cleaning the storage device, after a virus attack or a system failure.

Programs to recover ".NSF" files

Looking for a way to get files back? In cases when files were deleted and they cannot be restored by using standard operating system tools, use Hetman Partition Recovery.

The tool recovers data from any devices, regardless of the cause of data loss.

Follow the directions below:

  1. Download Hetman Partition Recovery, install and start the program.

  2. The program will automatically scan the computer and display all hard disks and removable drives connected to it, as well as physical and local disks.

    File Recovery Software
  3. Double-click on the disk from which you need to recover ".NSF" files, and select analysis type.

    Hetman Partition Recovery - Analysis Type
  4. When the scanning is over, you will be shown the files for recovery.

    Hetman Partition Recovery - Files that Can be Restored
  5. To find a file you need, use the program’s interface to open the folder it was deleted from, or go to the folder "Content-Aware Analysis" and select the required file type.

    Hetman Partition Recovery - Deep Scan
  6. Select the files you have been looking for and click "Recovery".

    File Recovery Software - Files List for Recovery
  7. Choose one of the methods for saving the files and recover them.

    Saving recovered files in Hetman Partition Recovery

How to open file with ".NSF" extension?

Looking for how to open a stereo nES Sound Format File image file file?

Programs that open ".NSF" files

DeliPlayer DeliPlayer
VirtuaNES VirtuaNES
Audio Overload Audio Overload
Nullsoft Winamp Nullsoft Winamp
Audio Overload Audio Overload
Nestopia Nestopia
Audio Overload Audio Overload
XMMS with nsf-xmms plugin XMMS with nsf-xmms plugin
Audacious Audacious

Additional Information

  • File type: NES Sound Format File

  • File extension: .NSF

  • Developer: N/A

  • Category: Audio Files

  • Format: N/A

  • Mime-type: application/octet-stream

  • HEX: 4E 45 53 4D 1A 01


  • File types that use the extension .NSF:

    • NES Sound Format File

    • Lotus Notes Database


We will be happy to answer your questions!

Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 13:12 #
    Leave a comment if you have any questions about Recovering lost .NSF files after deleting, cleaning or formatting!
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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 xaker.ru, 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 common causes of problems opening .NSF files and how can they be fixed?

    There can be several causes for problems opening .NSF (Lotus Notes Database) files. Here are some common causes and their potential solutions:

    1. Incompatible Software: If you don't have Lotus Notes or IBM Notes installed on your system, you may encounter difficulties opening .NSF files. To fix this, you need to install either Lotus Notes or IBM Notes on your computer.
    2. Corrupted .NSF File: If the .NSF file is corrupted or damaged, it may not open properly. In such cases, you can try using the "Fixup" tool provided by Lotus Notes to repair the file. To do this, open the command prompt, navigate to the Lotus Notes installation directory, and run the command "nfixup.exe .NSF file>". This tool attempts to fix any structural issues in the database.
    3. Large File Size: If the .NSF file is too large, it may take a long time to open or may not open at all. In this situation, you can try creating a local replica of the database. Open Lotus Notes, go to the File menu, click Database, and then click New Copy. Choose the local location to create a replica of the .NSF file, and then try opening the replica instead.
    4. Incorrect File Association: If the .NSF file is not associated with Lotus Notes, you may face problems opening it. To fix this, right-click on the .NSF file, select Open With, and choose Lotus Notes or IBM Notes as the default program to open .NSF files.
    5. Password Protection: If the .NSF file is password-protected and you don't have the correct password, you won't be able to open it. In this case, you need to obtain the correct password from the file owner or administrator.

    If none of these solutions work, it is advisable to contact the Lotus Notes support team or an IT professional for further assistance.

  • Are there any specific software or tools available to fix issues with opening .NSF files?

    Yes, there are several software and tools available to fix issues with opening .NSF files. Some of the popular ones include:

    1. IBM Lotus Notes: This is the official software from IBM for opening and managing .NSF files. It provides a comprehensive set of tools to fix issues and troubleshoot problems with .NSF files.
    2. Stellar Phoenix Lotus Notes Recovery: This software is specifically designed to repair and recover corrupt .NSF files. It can fix various issues like file header corruption, database corruption, etc., and restore the data from the damaged .NSF file.
    3. SysTools NSF Viewer: This tool allows you to open, view, and analyze .NSF files without the need for Lotus Notes. It can also fix minor issues with .NSF files and provide a preview of the data stored in them.
    4. Kernel for Lotus Notes to Outlook: This software helps in converting .NSF files to Outlook PST format. During the conversion process, it automatically fixes any issues with the .NSF file and ensures a smooth migration of data.
    5. Quick Recovery for Lotus Notes: This tool is designed to repair and recover corrupt .NSF files and restore the data from them. It can fix various issues like file header corruption, virus attacks, accidental deletion, etc.

    These are just a few examples of the software and tools available to fix issues with opening .NSF files. It is recommended to choose a tool based on your specific requirements and the severity of the issue you are facing.

  • How can one recover data from a corrupted .NSF file and ensure it can be opened without any problems?

    Recovering data from a corrupted .NSF (Lotus Notes Database) file can be a complex process, but here are some steps you can try:

    1. Make a backup: Before attempting any recovery process, it's important to create a backup copy of the corrupted .NSF file to avoid any further damage.
    2. Use the Lotus Notes Fixup tool: This tool is provided by Lotus Notes and can fix minor issues with the database structure. Open the command prompt and navigate to the Lotus Notes installation directory. Run the command "nfixup.exe .NSF file>". This tool will attempt to fix any structural issues within the database.
    3. Use the Lotus Notes Compact tool: Similar to the Fixup tool, the Compact tool can help to recover data from a corrupted .NSF file. Run the command "ncompact.exe -c .NSF file>". This tool will create a new copy of the database, excluding any corrupt documents.
    4. Use the Lotus Notes Updall tool: The Updall tool can be used to rebuild corrupted views and indexes within the .NSF file. Run the command "nupdall.exe -R .NSF file>". This process may take some time, but it can help to recover data from corrupted views.
    5. Use third-party recovery tools: If the above methods fail to recover your data, you can consider using third-party tools specifically designed for recovering data from Lotus Notes databases. Some popular tools include Stellar Phoenix Lotus Notes Recovery, SysInfoTools NSF Recovery, and Kernel for Lotus Notes Recovery. These tools can scan the corrupted .NSF file and extract data that can be opened without any problems.

    Note: It's important to remember that data recovery success may vary depending on the extent of corruption and the specific tools used. It's always recommended to consult with a professional or contact IBM Support for assistance in critical data recovery situations.

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