Recover .SY_ Files from Formatted USB Drives and External Storage

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

Recover .SY_ Files from Formatted USB Drives and External Storage
Data Recovery Tool

What is a .SY_ file?

Compressed .SYS file sometimes used by application installers to reduce the size of installation files; similar to a .EX_ or .DL_ file and can be expanded back to a SYS file using the Microsoft Expand command line utility with the following syntax:

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

There are several common causes of ".SY_" files being lost or experiencing failure:

  1. Accidental deletion: Users may accidentally delete ".SY_" files while organizing or cleaning up their computer's storage.
  2. Software or hardware issues: Problems with the operating system, software conflicts, or hardware malfunctions can lead to ".SY_" file loss or corruption.
  3. Virus or malware attacks: Malicious programs can infect and damage ".SY_" files, making them inaccessible or causing them to be deleted.
  4. File system errors: Errors within the file system, such as file system corruption or bad sectors on the storage device, can result in ".SY_" file loss.
  5. Power outages or system crashes: Sudden power outages or system crashes during file operations can lead to ".SY_" files being lost or becoming corrupted.
  6. Improper file handling: Improper handling of ".SY_" files, such as forceful ejection of storage devices or interrupting file transfer processes, can cause file loss or corruption.
  7. Human error: Mistakes made by users, such as accidental formatting of storage devices or improper file manipulation, can result in ".SY_" file loss.
  8. Disk or storage device failure: Physical damage to the storage device, such as a hard drive failure or a damaged memory card, can lead to ".SY_" file loss.

It is important to regularly backup important files, including ".SY_" files, to prevent data loss in case of any of these failures.

How to recover lost ".SY_" 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 ".SY_" file may be deleted.

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🧺 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 ".SY_" file is always to create it once more.

Use programs for recovering ".SY_" 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 ".SY_" 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™ 4.9
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 ".SY_" 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 ".SY_" extension?

Looking for how to open a stereo compressed SYS File image file file?

Programs that open ".SY_" files

Windows
Microsoft Expand Microsoft Expand

Additional Information

  • File type: Compressed SYS File

  • File extension: .SY_

  • Developer: Microsoft

  • Category: Compressed Files

  • Format: Binary

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Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 14:44 #
    Leave a comment if you have any questions about Recovering lost .SY_ 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 ".SY_ Recovery" and how does it work?

    ".SY_ Recovery" refers to a file compression format used in Microsoft Windows installation files. It is typically used to compress system files and reduce the size of the installation package. The compressed files have the extension ".SY_".

    The process of ".SY_ Recovery" involves decompressing the files from the ".SY_" format back to their original state. This is usually done during the Windows installation process or when specific system files need to be restored or repaired.

    To decompress the files, the Windows operating system has built-in tools like Expand.exe or Makecab.exe. These tools can extract the compressed files and restore them to their original format and location on the system. The extracted files can then be used for various purposes, such as system repairs, updates, or replacing corrupted files.

  • What are the common reasons for needing a ".SY_ Recovery" process?

    The common reasons for needing a ".SY_ Recovery" process are as follows:

    1. System file corruption: If the system files on your computer get corrupted or damaged, it can lead to various issues, including system crashes, errors, or the inability to boot the operating system. In such cases, the ".SY_ Recovery" process may be required to restore the system files to their original state.
    2. Virus or malware infection: Viruses or malware can infect and modify system files, leading to instability or malfunctioning of the operating system. Running a ".SY_ Recovery" process can help remove the infected files and restore the system to a clean state.
    3. Software installation or update issues: Sometimes, during the installation or update of certain software, system files may become overwritten, deleted, or modified incorrectly. This can result in system instability or errors. Performing a ".SY_ Recovery" process can help revert the changes made during the software installation or update and restore the system's functionality.
    4. Operating system upgrade or migration: When upgrading or migrating to a new operating system, there is a possibility of encountering compatibility issues or errors that can affect system performance. In such cases, a ".SY_ Recovery" process can help resolve these issues and ensure a smooth transition to the new operating system.
    5. Hardware failure: In some cases, hardware failures such as hard drive crashes or faulty RAM can cause system files to become inaccessible or corrupted. Running a ".SY_ Recovery" process can help recover or repair the affected files and restore the system's functionality.
    6. Accidental deletion or modification of critical system files: Sometimes, users may accidentally delete or modify critical system files, leading to system instability or inability to boot. In such cases, a ".SY_ Recovery" process can help restore the deleted or modified files and bring the system back to a working state.

    It is important to note that the specific reasons for needing a ".SY_ Recovery" process may vary depending on the operating system and the unique circumstances of each situation.

  • Are there any specific tools or software available for performing a successful ".SY_ Recovery"?

    Yes, there are several tools and software available for performing a successful ".SY_" recovery. Here are a few examples:

    1. File Recovery Software: Tools like Recuva, EaseUS Data Recovery Wizard, and Stellar Data Recovery can help recover deleted or lost ".SY_" files from various storage devices.
    2. File Compression Software: Programs like WinRAR, 7-Zip, and WinZip can be used to extract the contents of ".SY_" files. Simply renaming the file extension from ".SY_" to ".ZIP" or ".RAR" may allow these tools to open and extract the files.
    3. Disk Imaging Software: Tools such as Acronis True Image, Clonezilla, and Macrium Reflect can create disk images of your storage device, allowing you to recover ".SY_" files from the image without modifying the original source.
    4. Hex Editors: Hex editors like HxD, Hex Fiend, and 010 Editor can be used to manually examine and edit the contents of ".SY_" files. This can be helpful if the file is corrupted or contains important data that needs to be recovered.

    It's important to note that the success of ".SY_" recovery depends on various factors such as the state of the file, the storage medium, and the actions taken after the file was lost or deleted. It's always recommended to have a backup of important files to avoid data loss.
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