If you’re trying to access old Outlook emails from an OST file and need them in PST format, you’re not alone. Many users face the challenge of converting OST (Offline Storage Table) files into PST (Personal Storage Table) format — especially when migrating systems, recovering mailboxes, or accessing disconnected Outlook profiles.

In this step-by-step guide, you’ll learn how to convert OST to PST effortlessly using one of the most reliable tools on the market — Stellar Converter for OST.

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⭐ Why Choose Stellar Converter for OST?

Stellar Converter for OST is a powerful and trusted tool used by Microsoft MVPs and IT administrators globally. It helps users convert even large or corrupted OST files into PST format — without any data loss.

Key Features:

• Converts large-sized OST files without limitations
• Recovers deleted items
• Supports multiple export formats: PST, MSG, EML, RTF, HTML, and PDF
• Lets you preview and filter mailbox items before saving
• Preserves original folder hierarchy and metadata

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🛠️ Step-by-Step Guide to Convert OST to PST

Step 1: Download and Install the Software

1. Visit the official Stellar Converter for OST website.
2. Click Free Download to get the installer.
3. Run the setup file and follow these installation prompts:
   • Click Next
   • Accept the License Agreement
   • Choose an install location (optional)
   • Click Install → then Finish

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Step 2: Launch the Software and Select Your OST File

Once the tool is installed, launch it. You will see two options:

• List Profile: Automatically detects OST files associated with Outlook profiles.
• Choose Manually: Browse and select the OST file manually.

If you’re unsure of the file location:

• Use the Find option to scan drives for OST files.
• Select the correct OST file from the results.

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Step 3: Convert the OST File

1. Once the OST file is selected, click Convert.
2. The software will begin analyzing the file — this may take some time depending on file size.
3. After scanning, you’ll see a preview of all mailbox items (emails, calendar, notes, tasks, etc.) on the left panel.
4. Review and confirm the contents.

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Step 4: Save the Converted File as PST

1. Click Home > Save Converted File.
2. Choose PST as the output format (other options include MSG, EML, RTF, HTML, PDF).
3. Select a destination folder to save the PST file.
4. (Optional but recommended):
   • Check Recover Deleted Items
   • Enable Auto-split PST if you’re dealing with very large files
5. Click OK and wait for the conversion to complete.
6. Once finished, the software will show the file save location and size.

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📥 Import the PST File into Outlook

For Classic Outlook Users:

1. Open Outlook Classic.
2. Go to File > Open & Export > Open Outlook Data File.
3. Browse to the folder where you saved the converted PST.
4. Select the file and click OK.

The converted mailbox will now appear in your Outlook sidebar. You can access all folders such as Inbox, Sent Items, Deleted Items, and more.

Note for New Outlook Users:

If you’re using the new Outlook app (on Windows 10/11), the File > Import/Export options may not be visible.
Switch to Classic Outlook by:

• Going to Help in the top-left menu
• Clicking “Go to Classic Outlook”

After switching, follow the steps above to import the PST file.

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✅ Final Thoughts

Converting an OST to PST doesn’t have to be difficult. With Stellar Converter for OST, you can securely and efficiently convert your files without worrying about data loss or corruption.

Whether you’re migrating to a new system, recovering data, or need access to a disconnected Outlook profile, this tool offers a reliable and user-friendly solution.

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🔗 Useful Link

👉 Download Stellar Converter for OST

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🏷️ Tags:

OST to PST, Stellar Converter for OST, convert OST file, outlook recovery, import PST Outlook, recover deleted emails, OST file not opening, convert large OST file, email recovery tools, Outlook data file converter

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📢 Hashtags:

#OSTtoPST #StellarConverter #OutlookTips #EmailRecovery #PSTImport #OutlookMigration #OSTRecovery #TechGuide #WindowsTips #DataConversion

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⚠️ Disclaimer:

This article is intended for educational purposes only. Always download software from official websites to ensure safety and integrity. While Stellar Converter for OST is a reputable tool, ensure you back up your data before making any modifications or conversions.

Rakesh Bhardwaj

Rakesh Bhardwaj is a seasoned editor and designer with over 15 years of experience in the creative industry. He specializes in crafting visually compelling and professionally polished content, blending precision with creativity. Whether refining written work or designing impactful visuals, Rakesh brings a deep understanding of layout, typography, and narrative flow to every project he undertakes.

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