.001 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 .001 file recovery guide for Windows, MacOS, Android and IOS in 2024.

001 File Recovery

What is a .001 file?

A 001 file is the first file of a split archive created with various file splitting and joining utilities. It is used to split large archives into smaller, more manageable files. 001 files can be used for saving files onto multiple storage devices, such as USB drives or CDs, or for creating smaller email attachments.

What Are Common Causes of ".001" Files Lost or Failure?

There can be several common causes for ".001" file loss or failure. Some of these include:

  1. Incomplete or interrupted file downloads: If the download of the ".001" file is not completed successfully or is interrupted due to network issues, the file may become corrupted or incomplete.
  2. File system errors: Issues with the file system, such as disk errors or corruption, can lead to the loss or failure of ".001" files.
  3. Accidental deletion: Users may accidentally delete the ".001" file, either individually or as part of a larger file set, resulting in its loss.
  4. Software or hardware issues: Problems with the software used to open or extract ".001" files, or hardware malfunctions, can cause the files to fail or become inaccessible.
  5. Virus or malware infections: If the system is infected with viruses or malware, it can corrupt or delete ".001" files, leading to their loss or failure.
  6. File compression errors: ".001" files are often used as part of a compressed archive. If there are errors or issues during the compression process, it can result in the loss or failure of the ".001" file.
  7. Improper file handling: Mishandling or improper management of ".001" files, such as moving, renaming, or modifying them incorrectly, can cause their loss or failure.
  8. Storage media issues: Problems with the storage media where the ".001" files are stored, such as hard drive failures or physical damage, can lead to their loss or failure.

It is important to regularly back up important files and ensure the use of reliable software and storage devices to minimize the risk of ".001" file loss or failure.

How to recover lost ".001" 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 ".001" 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 ".001" file is always to create it once more.

Use programs for recovering ".001" 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 ".001" 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 ".001" 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 ".001" extension?

Looking for how to open a stereo split Archive File image file file?

Programs that open ".001" files

Smith Micro StuffIt Deluxe for Windows Smith Micro StuffIt Deluxe for Windows
Welltek 001 File Joiner & Splitter Welltek 001 File Joiner & Splitter
SplitJoin SplitJoin
7-Zip 7-Zip
OO1 File Manager OO1 File Manager
Smith Micro StuffIt Deluxe 16 Smith Micro StuffIt Deluxe 16
Split & Concat Split & Concat
Incredible Bee Archiver Incredible Bee Archiver

Additional Information

  • File type: Split Archive File

  • File extension: .001

  • Developer: N/A

  • Category: Backup Files

  • Format: Binary

  • HEX: 00 4E 4F 52 54 4F 4E 20 56 65 72 20


  • File types that use the extension .001:

    • Split Archive File

    • Norton Ghost Disk Backup

    • Multimedia Fusion Backup File

    • Fax File

    • Snes9x Slot 2 Saved State


We will be happy to answer your questions!

Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 14:00 #
    Leave a comment if you have any questions about Recovering lost .001 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 is a ".001 backup" and how does it differ from other types of backups?

    A ".001 backup" refers to a specific type of backup that involves breaking up a large file into smaller, more manageable parts. It is commonly used in scenarios where the file size is too large for a single backup or transfer.

    In a ".001 backup," the original file is divided into multiple parts, typically with a ".001" extension for the first part, followed by ".002," ".003," and so on. These parts are usually of equal size, making it easier to store or transfer them.

    The main difference between a ".001 backup" and other types of backups lies in the way the file is split. Other backup methods, such as full backups or incremental backups, typically involve copying or archiving the entire file or only the changes made since the last backup. In contrast, a ".001 backup" focuses on dividing the file into smaller segments to facilitate storage or transfer.

    To restore or use the file from a ".001 backup," all the parts need to be combined or reassembled into the original file format. This can be done using specialized software or utilities that can recognize and merge the different parts.

    Overall, a ".001 backup" is a method used to handle large files by breaking them into smaller, more manageable pieces, making it easier to store, transfer, or archive them.

  • How can a ".001 backup" be created and what are the benefits of using this method?

    A ".001 backup" refers to a method of creating a backup by splitting the backup file into multiple smaller files, typically with the extension ".001", ".002", ".003", and so on. These files are created using file archiving or compression tools that support splitting large files into smaller parts.

    To create a ".001 backup," follow these steps:

    1. Choose a file archiving or compression tool that supports splitting files. Popular tools include WinRAR, 7-Zip, and WinZip.
    2. Open the tool and select the files or folders you want to back up.
    3. Choose the option to compress or archive the files. In the settings or options menu, look for an option related to splitting files.
    4. Specify the maximum file size for each part. For example, if you set it to 100MB, the tool will create multiple files, each with a maximum size of 100MB.
    5. Start the compression or archiving process. The tool will split the backup into multiple files, typically with sequential numbering like ".001", ".002", etc.

    Benefits of using the ".001 backup" method:

    1. Easy transfer and storage: Splitting the backup into smaller parts allows for easier transfer and storage, especially when dealing with limited file size restrictions or media with lower capacity.
    2. Incremental or selective restoration: If only a portion of the backup is needed, the ".001 backup" method allows for selective restoration. You can choose to restore specific parts of the backup without having to restore the entire backup.
    3. Error resilience: In case of a transfer or download error, having the backup split into multiple parts reduces the chances of losing the entire backup. If one part is corrupted or lost, the remaining parts can still be used.
    4. Time efficiency: When transferring or restoring the backup, the smaller file parts can be processed faster than a single large file. This can save time, especially when dealing with limited bandwidth or slower transfer speeds.
    5. Flexibility: Splitting the backup into smaller parts provides flexibility in managing and organizing the backup files. You can easily copy or move specific parts, delete unnecessary parts, or store them on different storage media.

    It's important to note that when using this method, all parts of the backup must be kept together to ensure successful restoration.

  • Are there any limitations or risks associated with using a ".001 backup" for data backup and recovery?

    Using a ".001 backup" method for data backup and recovery can have certain limitations and risks. Here are a few to consider:

    1. Fragmented Backup: Storing data in multiple parts or fragments (.001, .002, etc.) can lead to a fragmented backup. If any part of the backup is lost or corrupted, it may render the entire backup useless, making it difficult to recover the data.
    2. Complexity: Managing and organizing multiple backup files can become complex, especially when dealing with a large number of files. It may require additional software or scripts to handle the backup and recovery process effectively.
    3. Increased Risk of Data Loss: With multiple backup files, the chances of losing or misplacing a part of the backup increase. If any part of the backup is lost, damaged, or accidentally deleted, it can result in data loss, making the recovery process more challenging.
    4. Time-consuming Recovery: Recovering data from a ".001 backup" can be time-consuming, especially if the backup is spread across multiple files. Each file needs to be located, restored, and combined to recover the complete data, which can be a time-intensive process.
    5. Storage Space: Storing data in multiple backup files can consume more storage space compared to other backup methods. This may become a concern, especially when dealing with large amounts of data or limited storage resources.
    6. Increased Complexity for Restoration: Restoring data from a ".001 backup" may require additional steps and processes to combine the backup files and restore the data to its original state. This complexity can introduce more opportunities for errors or complications during the restoration process.

    It's important to evaluate these limitations and risks against your specific backup and recovery needs before deciding on a particular backup method.

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