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

CALS File Recovery

What is a .CALS file?

1-bit (black and white) image; can be uncompressed or compressed using CCITT group 4 compression; available in Type I and Type II versions, though Type I is more common.

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

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

  1. Accidental deletion: Users may accidentally delete ".CALS" files while organizing or cleaning up their computer's storage, leading to permanent loss.
  2. File system corruption: File system corruption can occur due to various reasons such as hardware issues, software conflicts, or improper system shutdowns. This can result in the loss or corruption of ".CALS" files.
  3. Virus or malware attacks: Malicious software can infect and damage ".CALS" files, making them inaccessible or causing them to fail.
  4. Software or hardware issues: Problems with the software used to open or handle ".CALS" files can lead to file failure. Similarly, hardware failures such as disk errors or bad sectors can cause ".CALS" files to become unreadable.
  5. Improper file conversion: Incorrect conversion of ".CALS" files to other formats or vice versa can result in file corruption or loss of data.
  6. Power outages: Sudden power outages or power surges while working with ".CALS" files can cause data loss or file corruption.
  7. Human error: Mistakes made by users, such as accidentally overwriting or modifying ".CALS" files, can lead to file failure or loss.
  8. Storage media failure: If the storage device where ".CALS" files are stored (such as hard drives, flash drives, or memory cards) fails or becomes damaged, it can result in the loss of files.
  9. Software bugs or glitches: Occasionally, software bugs or glitches can cause ".CALS" files to become corrupted or fail to open properly.
  10. Operating system issues: Problems with the operating system can cause ".CALS" files to become inaccessible or fail to function correctly.

It is important to regularly back up ".CALS" files and take preventive measures to minimize the risk of file loss or failure.

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

Use programs for recovering ".CALS" 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 ".CALS" 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.

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 ".CALS" 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 ".CALS" extension?

Looking for how to open a stereo cALS Raster Graphic File image file file?

Programs that open ".CALS" files

Adobe Photoshop CC 2019 Adobe Photoshop CC 2019
CorelDRAW Graphics Suite 2019 CorelDRAW Graphics Suite 2019
Corel PaintShop Pro 2020 Corel PaintShop Pro 2020
ACD Systems Canvas X 2019 ACD Systems Canvas X 2019
Newera Graphics Converter Pro Newera Graphics Converter Pro
Adobe Photoshop CC 2019 Adobe Photoshop CC 2019

Additional Information

  • File type: CALS Raster Graphic File

  • File extension: .CALS

  • Developer: N/A

  • Category: Raster Image Files

  • Format: N/A


We will be happy to answer your questions!

Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 11:50 #
    Leave a comment if you have any questions about Recovering lost .CALS 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 .CALS backup file and how does it differ from other backup file formats?

    A .CALS backup file is a file format used for backup purposes. CALS stands for Computer-Aided Acquisition and Logistic Support, which is a set of standards developed by the U.S. Department of Defense for the exchange of technical data.

    The .CALS backup file format is specifically designed for storing and exchanging technical data, such as engineering drawings, diagrams, and other graphical information. It is commonly used in industries like aerospace, defense, and manufacturing.

    The main difference between a .CALS backup file and other backup file formats is the structure and content it supports. While other backup file formats like .ZIP or .TAR can store a wide range of files and folders, a .CALS backup file is optimized for technical data and can preserve the integrity of graphical information, including vector graphics, annotations, and metadata.

    Additionally, .CALS backup files often adhere to specific standards and guidelines, ensuring compatibility and interoperability across different systems and software applications in industries that require the exchange of technical data.

    In summary, a .CALS backup file is a specialized file format for storing and exchanging technical data, particularly graphical information, and it differs from other backup file formats by its focused purpose and adherence to industry-specific standards.

  • What are the benefits of using .CALS backup for data storage and recovery?

    There are several benefits of using .CALS backup for data storage and recovery:

    1. Efficient storage: .CALS (Computer-Aided Acquisition and Logistic Support) is a file format specifically designed for storing and transmitting large amounts of data efficiently. It uses a compressed binary format, which helps in reducing the file size and optimizing storage space.
    2. Fast data recovery: .CALS backups are typically stored in a single file, making it easier and faster to restore data in case of data loss or system failure. The compressed format also helps in reducing the time required for data recovery.
    3. Data integrity: .CALS backup files use checksums and error correction techniques to ensure data integrity. This means that the backup files are less prone to corruption and can be relied upon for accurate data recovery.
    4. Compatibility: .CALS is a widely accepted industry standard for data storage and exchange, especially in the defense and aerospace sectors. It is supported by various software applications and systems, ensuring compatibility and ease of use.
    5. Version control: .CALS backups can be easily versioned, allowing users to maintain multiple copies of the same data at different points in time. This enables users to restore data from a specific backup version, which can be crucial in case of accidental data deletion or data corruption.
    6. Scalability: .CALS backups can handle large volumes of data, making them suitable for organizations with extensive data storage requirements. The compressed format ensures that the backup files remain manageable in terms of size, even as the data volume increases.
    7. Security: .CALS backups can be encrypted, providing an additional layer of security for sensitive data. Encryption ensures that the backup files can only be accessed and restored by authorized individuals, protecting the data from unauthorized access or theft.

    Overall, using .CALS backup for data storage and recovery offers efficient, fast, and reliable solutions for organizations that deal with large amounts of data and require a robust backup strategy.

  • How can one create and restore a .CALS backup file effectively to ensure data integrity and accessibility?

    To create and restore a .CALS backup file effectively, follow these steps:

    1. Determine the backup strategy: Decide on the frequency of backups (daily, weekly, monthly), the retention period (how long to keep backups), and the storage location (local server, cloud storage, external drive).
    2. Use a reliable backup software: Choose a backup software that supports .CALS files and offers features like encryption, compression, and scheduling. Popular options include Acronis True Image, EaseUS Todo Backup, and Backup Exec.
    3. Select the data to backup: Identify the specific .CALS files or folders that need to be backed up. It's recommended to include all relevant data, including associated databases or configuration files.
    4. Configure backup settings: Set the backup software to create a .CALS backup file. Specify the backup type (full, incremental, or differential), compression level, encryption options, and destination path. Ensure that the backup destination has enough storage capacity.
    5. Schedule backups: If possible, schedule automatic backups to ensure regular and consistent backups. Choose a time when the system usage is low to minimize disruptions.
    6. Test the backup process: Before relying on the backup, perform a test restore to verify that the backup file is created correctly and can be restored without issues. This step ensures data integrity and accessibility.
    7. Monitor backup operations: Regularly check the backup logs or notifications to ensure that backups are running successfully. Address any errors or failures promptly.
    8. Store backups securely: If using local storage, ensure that backups are stored on separate physical media or drives to protect against hardware failures. If using cloud storage, choose a reputable provider with strong security measures.
    9. Periodically verify backups: Perform periodic checks to ensure that the backup files are not corrupted and can be restored successfully. This verification process helps maintain data integrity.
    10. Document the backup and restore process: Create a detailed documentation of the backup and restore procedures, including software settings, schedules, and any specific instructions. This documentation will be helpful during disaster recovery scenarios.

    By following these steps, one can create and restore .CALS backup files effectively, ensuring data integrity and accessibility in case of data loss or system failures.

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