How to Convert OST to PST Files - Top 4 Methods

6 min read
17 October 2023

How to Convert OST to PST Files - Top 4 Methods

Both OST and PST are Microsoft Outlook data files used to store email folders, contacts, calendars, and other information. However, a routine server crash necessitates converting OST to PST files. Here, we'll go over the different ways to convert OST files to PST files, including manual and expert approaches.

Offline Storage Table is shortened to OST. On the server, a copy of the mailbox data is kept. You may even work without internet access thanks to it. You can simply modify, compose, save, and delete email messages if your data is saved in the OST format, and these modifications are current the next time you connect to the Exchange server.

Personal Storage Table is referred to as PST. The copy of the data from Outlook that is stored on the configured system is stored in PST files. It is the most used data file for Outlook. The Import/Export features' Export to File option makes it simple to produce PST files. PST files are password-protected for security. You must input the password in order to open the PST file.

The Benefits of OST to PST File Conversion

The following are possible justifications for converting OST to PST files:

  • Since the OST file has grown huge and gotten corrupted, it can be converted to a PST file to reduce mailbox size.
  • When you convert an OST file to a PST file, you can stop worrying about data loss due to human error.
  • You must convert these files into PST if you want to view the offline data.
  • Outlook and Exchange are both compatible with OST. In order to transfer old email data to another email client, you must convert OST to PST.

OST to PST Conversion Techniques

Here, we've listed the top four ways to convert OST files to PST files. Due to the fact that the OST file can be opened with the same profile, all techniques require access to Outlook.

Method 1: Use the Import/Export feature to convert OST to PST

To export OST to PST file format using this method, you must utilise the Outlook login information associated with the Exchange account.

  • Launch Microsoft Outlook on your personal computer.
  • Choose Import & Export from the Open & Export section on the File menu.
  • Now click Next after choosing Export to a File from the list of actions to carry out.
  • From the Create a File menu, select Outlook Data File (.pst), and then click the Next button.
  • Select the folder you wish to export after that by clicking the Next button.
  • To choose the destination for the output data files, click the Browse option.
  • Click the Finish button after selecting the alternative duplication management option.
  • If you want to password-protect the PST file, set it and then click OK to complete the procedure.

Method 2: Drag and Drop OST to PST File Conversion

  • Open Microsoft Outlook on your computer.
  • In your Outlook profile, create a fresh PST file.
  • Drag the desired exportable folders to the newly created PST file.

Note: You cannot drag stuff like your inbox or contacts to a PST file using this method.

Method 3: Use the Outlook Archive Option to Transform OST to PST Files

  • Access Microsoft Outlook on your computer.
  • Navigate to the File menu and select Archive.
  • Click Browse to choose the location to save the archived file after choosing the desired File or Folder to Archive.
  • press the finish button.

Note: Using this technique will not convert the contacts.

Problems with Manual Method

The three manual ways to convert OST to PST files are described above. Although these techniques are free, manual ones have the following restrictions:

  • Manual processes take a lot of time and effort.
  • The technique does not ensure that all mailbox items will be backed up.
  • OST to PST conversion will halt if the OST file size is too huge.
  • Conversion may result in the loss of some data, and the process may have many steps.
  • The technique is inappropriate for OST files that are corrupt or damaged.

Method 4: Use a Professional Method to Convert OST to PST Files

The best and most dependable software for converting OST to PST files is ZOOK OST to PST Converter Tool. With the help of this utility, you may convert OST files into a variety of formats, including PST, EML, and MBOX. The utility simultaneously converts one or more OST files to PST files with all attachments. After converting, it can keep the folder hierarchy and data integrity. During the converting process, there are no size restrictions. The programme also offers the ability to filter specific files or directories. Additionally, it has the option to convert OST files to many document formats, including PDF, CSV, HTML, etc. The app can also extract email information like phone number and email address.

How to Change OST Files to PST Files

  • Install the ZOOK OST to PST Converter Tool on your local machine by downloading it.
  • In the menu bar on the upper left, select Open.
  • Select the Outlook OST Files option under Email Data Files, then click Choose from a Folder.
  • Select OST files from your computer then choose the Open option.
  • You can now view your loaded OST files in the programme.
  • To load your emails, choose your OST file folder from the left menu bar.
  • Click the Export button now, then choose PST from the drop-down list.
  • Choose the location to save the result by clicking the Browse option.
  • To start the procedure, select the Save option. On your screen, you may also view the conversion process's real-time progress.
  • After exporting is complete, select Open Folder to see the results.


Here, we've described how to convert OST files to PST files manually and automatically. Although manual procedures are free, they fall short of our expectations. Therefore, to finish this work, we employ ZOOK OST to PST Converter. It has a lot of benefits and is quite dependable. With any luck, this post will help you convert your OST files to PST files.

In case you have found a mistake in the text, please send a message to the author by selecting the mistake and pressing Ctrl-Enter.
rosefresh 2
Joined: 7 months ago
Comments (0)

    No comments yet

You must be logged in to comment.

Sign In / Sign Up