How to Retrieve .ONE Files After System Malfunctions

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 .ONE file recovery guide for Windows, MacOS, Android and IOS in 2025.

How to Retrieve .ONE Files After System Malfunctions
Data Recovery Tool

What is a .ONE file?

A ONE file is a document created by OneNote, a note-taking program developed by Microsoft. It contains one or more sections made up of one or more pages of content. ONE files may contain text, digitized handwriting, and objects pasted from other applications, such as images, drawings, and audio/video clips.

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

There are several common causes of ".ONE" file loss or failure:

  1. Accidental deletion: Users may accidentally delete ".ONE" files while organizing or cleaning up their files, leading to their loss.
  2. File corruption: ".ONE" files can become corrupted due to various reasons such as system crashes, power outages, or software errors. This can make the files unreadable or inaccessible.
  3. Virus or malware attack: Malicious software can infect ".ONE" files and cause them to be deleted, corrupted, or encrypted, rendering them unusable.
  4. Hardware failure: If the storage device where the ".ONE" files are stored (such as a hard drive or USB drive) fails, it can result in the loss or corruption of the files.
  5. Software or application issues: Problems with the software or application used to create or open ".ONE" files can lead to file failure or loss. This can include software bugs, compatibility issues, or improper handling of the files.
  6. Human error: Users may accidentally overwrite or save changes to ".ONE" files, leading to data loss or file failure.
  7. Operating system issues: Errors or glitches in the operating system can cause ".ONE" files to become inaccessible or disappear.
  8. Synchronization errors: If ".ONE" files are stored in cloud storage or synced across multiple devices, synchronization errors can occur, resulting in file loss or failure.

It is always recommended to have backups of important ".ONE" files to minimize the impact of any potential loss or failure.

How to recover lost ".ONE" 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 ".ONE" 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 ".ONE" file is always to create it once more.

Use programs for recovering ".ONE" 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 ".ONE" 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.

Partition Recovery™ 5.0
The tool recovers data from any devices, regardless of the cause of data loss.
Download

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 ".ONE" 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 ".ONE" extension?

Looking for how to open a stereo oneNote Document image file file?

Programs that open ".ONE" files

Windows
Microsoft OneNote 2016 Microsoft OneNote 2016
Mac
Microsoft OneNote Microsoft OneNote
iOS
Microsoft OneNote Microsoft OneNote
Android
Microsoft OneNote Microsoft OneNote

Additional Information

  • File type: OneNote Document

  • File extension: .ONE

  • Developer: Microsoft

  • Category: Data Files

  • Format: N/A

  • HEX: E4 52 5C 7B 8C D8 A7 4D AE B1 53 78 D0 29 96 D3

  • ASCII: дR{.Ш.M..SxР)–У

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Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 13:13 #
    Leave a comment if you have any questions about Recovering lost .ONE 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.

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Questions and answers

  • What is the purpose of ".ONE backup" and how does it work?

    ".ONE backup" refers to the backup feature provided by Microsoft's cloud storage service, OneDrive. The purpose of ".ONE backup" is to ensure the safety and availability of your files and data by creating a copy of them in the cloud.

    When you enable ".ONE backup" on your device, it automatically syncs your files and folders to your OneDrive account. This synchronization ensures that your files are backed up and accessible from any device with an internet connection. The backup process occurs in the background, continuously updating changes made to your files.

    If you accidentally delete or lose a file on your device, you can retrieve it from the OneDrive cloud storage. Additionally, if your device gets damaged or lost, you can restore your files on a new device by signing in to your OneDrive account.

    "OneDrive backup" provides an extra layer of protection for your important files, safeguarding them against data loss, device failure, or other unforeseen events. It allows you to have peace of mind knowing that your files are securely stored and easily recoverable.

  • What are the key features and benefits of using ".ONE backup" for data protection and recovery?

    The key features and benefits of using ".ONE backup" for data protection and recovery are:

    1. Automated Backup: ".ONE backup" offers automated backup functionality, allowing users to schedule regular backups without manual intervention. This ensures that your data is consistently protected without the risk of forgetting to back up important files.
    2. Incremental Backup: The solution utilizes incremental backup technology, which means that only the changes made since the last backup will be saved. This approach reduces backup time and storage requirements, making the process more efficient.
    3. Multiple Device Support: ".ONE backup" supports multiple devices, including PCs, Macs, servers, and mobile devices. This versatility enables users to back up and recover data from various sources, ensuring comprehensive protection across all platforms.
    4. Secure Cloud Storage: The backed-up data is stored securely in the cloud, protecting it from physical damage, theft, or loss. This cloud-based storage ensures that your data is always accessible and can be recovered from anywhere with an internet connection.
    5. Data Encryption: ".ONE backup" employs robust encryption algorithms to secure your data during transmission and storage. This ensures that your sensitive information remains protected from unauthorized access, maintaining privacy and compliance with data protection regulations.
    6. Quick Recovery: In case of data loss or accidental deletion, ".ONE backup" allows for quick and easy data recovery. Users can selectively restore specific files or folders, eliminating the need for a full system restore and minimizing downtime.
    7. Versioning and File History: The solution maintains multiple versions of backed-up files, enabling users to restore previous versions if needed. This feature is particularly useful in scenarios where file corruption or accidental changes occur, providing a safety net for data recovery.
    8. Scalability: ".ONE backup" is designed to scale as your data storage needs grow. Whether you have a small amount of data or a large enterprise-level backup requirement, the solution can accommodate and adapt to your changing needs.
    9. User-Friendly Interface: The solution offers a user-friendly interface that simplifies the backup and recovery process. The intuitive design makes it easy for users to configure backups, monitor progress, and restore files without requiring technical expertise.
    10. Cost-Effective: ".ONE backup" offers cost-effective data protection and recovery solutions. By eliminating the need for physical storage devices and reducing the risk of data loss, it saves businesses from potential financial losses associated with data breaches or system failures.
  • Can ".ONE backup" be used for both personal and business purposes, and what are the pricing options available for different usage scenarios?

    Yes, ".ONE backup" can be used for both personal and business purposes. It offers different pricing options based on the usage scenario. Here are some common pricing options:

    Personal Use:

    • Free Plan: Provides limited storage space and basic features for personal use.
    • Premium Plan: Offers more storage capacity, advanced features, and priority support for personal use. Usually, it has a monthly or annual subscription fee.

    Business Use:

    • Small Business Plan: Designed for small businesses with a limited number of users. It includes more storage, collaboration features, and priority support.
    • Enterprise Plan: Tailored for larger businesses with more users and extensive storage needs. It provides advanced security, customization options, and dedicated support.

    The exact pricing details may vary depending on the provider offering ".ONE backup" services. It's recommended to visit the official website of the service provider or contact their sales team for specific pricing information.
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