How to Migrate OST Files into PST Files – Step-by-Step Guide

Are you trying to move your Outlook data from an OST file to a PST file? You’re not alone. Many Outlook users face situations where they need to migrate OST to PST—and if that sounds tricky, don’t worry. We’ll explain everything in simple words, so even a beginner can do it easily.

In this guide, you’ll learn:

Let’s start from the beginning.

What Is an OST File?

An OST (offline storage table) file is created by Microsoft Outlook when you connect your email with Exchange Server, IMAP, or Office 365. It allows you to work with your email, contacts, and calendar—even if you're offline.

As soon as you're back online, everything syncs automatically.

What Is a PST File?

A PST (Personal Storage Table) file is another Outlook file format. It is used to store emails, contacts, tasks, and calendar events locally on your computer.

PST files are perfect for:

  • Creating email backups

  • Transferring emails between computers

  • Importing/exporting mail data manually


Why Do You Need to Migrate OST to PST?

There are many common situations where OST to PST migration becomes necessary:

  • Your email account is deleted or inaccessible

  • Outlook profile gets corrupted

  • You want to back up your mailbox

  • You are moving data from one PC to another

  • You need to access old mail without connecting to the server

  • You’re switching organizations or mail servers

This is where tools like OST to PST Converter Tool and OST File Converter come in handy.

Method 1: Manual Method (Only If Outlook Works)

If you can still open Outlook with the original OST file connected, follow these steps:

Step-by-Step:

  1. Open Microsoft Outlook

  2. Go to File > Open & Export > Import/Export

  3. Choose Export to a file > Click Next

  4. Select Outlook Data File (.pst) > Click Next

  5. Select the mailbox folder(s) you want to export

  6. Choose the destination folder and click Finish

✅ Your OST data is now saved as a PST file.

Method 2: Use OST to PST Conversion Software

But what if:

  • Your Outlook account is deleted?

  • The original email profile doesn't exist anymore?

  • The OST file is orphaned or damaged?

In that case, Outlook can’t open your OST file, and you need a dedicated tool like OST to PST Converter Software.

Best Way to Migrate OST to PST—Using a Tool

The most effective and easiest solution is using trusted OST to PST software like BLR OST File Converter.

What is BLR OST File Converter?

It’s a professional tool that helps you:

  • Open and scan OST files without Outlook

  • Convert OST to PST with just a few clicks

  • Recover emails, contacts, calendars, tasks, and more

  • Split large files into smaller PSTs

  • Keep the email folder structure intact

How to Migrate OST to PST Using BLR OST to PST Converter Tool

Here’s how easy it is:

Step 1: Install the Software

Download BLR OST to PST Converter Tool from the official website and install it like any normal app.

Step 2: Add the OST File

Launch the tool and click on "Browse" or "Add File" to select your OST file.

Step 3: Preview the Data

The software scans the OST file and lets you preview your emails, contacts, and calendars.

Step 4: Choose PST Format

From the export options, choose PST as your output format.

Step 5: Click on Convert

Select the destination folder and click on "Convert" or "Export". Done!

Step 6: Open the PST in Outlook

Now you can open the new PST file in Outlook:

  • Open Outlook > Go to File > Open & Export > Open Outlook Data File

  • Browse the converted PST file and click Open

✅ That’s it. You’ve successfully migrated your OST file into PST format.

Advantages of Using OST to PST Conversion Software

Here’s why using a tool is better:

Manual MethodOST to PST Software
Needs working OutlookWorks without Outlook
Fails with corrupted OSTCan repair and convert damaged OSTs
Slow and limited controlFast, safe, and flexible
No preview optionFull preview before conversion

So if you want a simple, smart, and safe method, go with a professional OST to PST Converter Tool like BLR OST File Converter.

Features to Look For in OST to PST Software

When choosing the right OST to PST Converter, look for these features:

  • Easy-to-use interface

  • Support for all Outlook versions (2010 to 2021)

  • File preview before conversion

  • Batch OST file conversion

  • Splitting large PST files

  • Option to migrate OST to other formats (EML, MSG, MBOX, etc.)

BLR OST File Converter offers all these features and more.

Frequently Asked Questions (FAQs)

❓ Can I use a free OST to PST converter?

Some tools offer a free trial or allow converting a limited number of emails for free. But full features usually require a licensed version.

❓ What if my OST file is corrupt?

Good OST to PST conversion software like BLR Tools can scan and fix corrupt OST files before converting.

❓ Is it safe to use OST File Converter tools?

Yes, as long as you download from a trusted provider like BLR Tools. These tools work locally on your PC and don’t upload your data online.

Final Thoughts

Migrating an OST file to a PST file may sound technical—but with the right tools and guidance, it’s actually easy. You can use Outlook’s export feature if your profile is still active. But if it’s not, using a powerful OST to PST Converter Tool is the best way forward.

We recommend BLR OST File Converter because it’s

  • Simple to use

  • Works without Outlook

  • Fast and accurate

  • Supports all types of OST files

Whether you're facing an Outlook crash, moving to a new PC, or just need a backup, converting OST to PST is a safe way to save your data.

Location: Sewak Park, Dwarka, Delhi, India

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