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

QDA File Recovery

What is a .QDA file?

Compressed archive created with Quadruple D (Do the DirectDraw with Delphi); part of a DirectX graphics library that is commonly used Japanese PC games written in Delphi; includes the Quadruple D Archiver for creating and opening QDA archives.

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

There can be several common causes of ".QDA" (Qualitative Data Analysis) files being lost or experiencing failure. Some of these causes include:

  1. Accidental deletion: Users may unintentionally delete ".QDA" files while performing file management tasks, such as organizing or cleaning up their computer's storage.
  2. Hardware or software issues: Problems with the storage device, such as a hard drive failure or corruption, can lead to the loss of ".QDA" files. Similarly, software issues like crashes or compatibility problems can result in file failure.
  3. Virus or malware attacks: Malicious software can infect and corrupt ".QDA" files, making them inaccessible or causing data loss.
  4. Power outages or system crashes: Unexpected power outages or system crashes while working on ".QDA" files can lead to their loss or corruption.
  5. File system errors: Errors in the file system, such as file system corruption or disk errors, can cause ".QDA" files to become inaccessible or lost.
  6. Human error: Mistakes made by users, such as accidental formatting of storage devices or improper handling of files, can result in the loss of ".QDA" files.
  7. Improper file transfer or storage: If ".QDA" files are not transferred or stored correctly, such as interrupted file transfers or using unreliable storage media, it can lead to file loss or failure.

To minimize the risk of losing ".QDA" files, it is recommended to regularly back up the files to a separate storage device, use reliable antivirus software, and maintain a stable and updated system.

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

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

Looking for how to open a stereo quadruple D Archive image file file?

Programs that open ".QDA" files

HEX Editor HEX Editor

Additional Information

  • File type: Quadruple D Archive

  • File extension: .QDA

  • Developer: N/A

  • Category: Compressed Files

  • Format: N/A


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Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 15:05 #
    Leave a comment if you have any questions about Recovering lost .QDA 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 the purpose of .QDA formats in qualitative data analysis?

    The purpose of .QDA formats in qualitative data analysis is to store and organize qualitative data for analysis purposes. .QDA formats, such as those used by software like NVivo or MAXQDA, allow researchers to import and manage various types of qualitative data, including text documents, audio recordings, images, videos, and more.

    These formats provide a structured environment for researchers to code, categorize, and analyze their qualitative data. Researchers can create nodes or codes to label and organize data, link related information, and perform complex queries to explore patterns, themes, and relationships within the data. .QDA formats also enable collaboration among researchers by allowing them to share and work on the same dataset simultaneously.

    By using .QDA formats, researchers can efficiently navigate and analyze large volumes of qualitative data, ensuring a systematic and rigorous approach to qualitative research.

  • What are some common software programs that support .QDA formats?

    Some common software programs that support .QDA (Qualitative Data Analysis) formats are:

    1. ATLAS.ti: A comprehensive qualitative data analysis software that allows users to code, analyze, and visualize qualitative data.
    2. NVivo: A powerful software for qualitative data analysis that helps researchers organize, code, and analyze their data.
    3. MAXQDA: A software program that supports qualitative and mixed methods research, offering features for coding, analyzing, and visualizing data.
    4. QDA Miner: A software tool for qualitative data analysis that includes features such as coding, categorizing, and exploring textual and multimedia data.
    5. Dedoose: An online qualitative data analysis tool that allows researchers to code, analyze, and collaborate on their data.
    6. Quirkos: A user-friendly qualitative data analysis software that helps researchers visualize and explore their data through coding and thematic analysis.
    7. HyperRESEARCH: A software program that supports qualitative data analysis through coding, annotating, and exploring textual data.
    8. Transana: A software tool specifically designed for analyzing video and audio data in qualitative research.

    These are just a few examples, and there are many other software programs available that support .QDA formats. The choice of software often depends on the specific needs and preferences of the researcher.

  • How can researchers convert their qualitative data into .QDA formats for analysis?

    Researchers can convert their qualitative data into .QDA (Qualitative Data Analysis) formats for analysis using the following steps:

    1. Choose a QDA software: There are various QDA software available, such as NVivo, ATLAS.ti, MAXQDA, and Dedoose. Researchers should select a software that suits their requirements and familiarity.
    2. Organize the data: Prior to importing the data into the QDA software, researchers should organize their qualitative data. This can involve categorizing and labeling the data, creating folders or directories, and ensuring that the data is in a format compatible with the chosen software.
    3. Import the data: Once the data is organized, researchers can import it into the QDA software. Most software allows for importing various file formats, including text documents, audio files, images, and video files. Researchers can import individual files or entire folders, depending on their needs.
    4. Code the data: Coding is a fundamental step in qualitative data analysis. Researchers need to assign codes to specific segments or themes within their data. QDA software provides tools to create codes, apply them to data segments, and organize them hierarchically or in a network.
    5. Annotate and memo: QDA software allows researchers to annotate their data by adding comments, memos, or notes. Researchers can use these annotations to record their thoughts, interpretations, and reflections on the data.
    6. Analyze and visualize: After coding and annotating the data, researchers can perform various analysis techniques using the QDA software. This may include searching for specific codes, creating reports, generating visualizations (such as word clouds, charts, or diagrams), and exploring relationships between codes or themes.
    7. Export and share: Once the analysis is complete, researchers can export the coded data, annotations, and analysis results from the QDA software. This allows for sharing the findings with others or integrating them into other research outputs, such as reports or academic papers.

    It is important for researchers to familiarize themselves with the specific features and functionalities of the chosen QDA software, as each software may have its own unique interface and workflow. Additionally, researchers should consider ethical considerations and data protection when working with qualitative data in digital formats.

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