What are OST and PST?
OST commonly known as Offline Storage Table. It is an offline Outlook data file that stores an offline copy of the outlook data item that exists on the user's computer. This file allows the worker to work even in the absence of server connections.
PST file is commonly known as Personal Storage Table. This file used to store local copies of messages, calendar events, and other items of Outlook.
Why make Conversion of OST TO PST?
- The main disadvantage of OST is that the users cannot access their mailbox information at the time of any technical issues or server error.
- Another reason to convert OST is the file size limitation. Outlook supports making OST file with 20 GB and when it exceeds size limitations than the OST file shows a corruption error message.
And for resolving these problems the conversion of the OST file to PST can be helpful.
Methods to convert OST to PST
The following steps are necessary for converting outlook OST file to PST file
Import/Export
- First, open the Outlook and go to the File option in the top right corner. After that click to Open & Export and select the Import/Export option.

- Then a new popup window will open on the screen select the Export to a file>> Next.

- Choose Outlook Data File (.pst)>> Next. Then the export Outlook Data file popup will appear on the screen and here check on include subfolders option>> Next.

- Then a new window will open and here browse the location to save the PST file. At the end hit on the finish button.

2 Transfer OST to PST by the Archive Process.
- First, open the configured Outlook and open the OST, which you want to export into OST.
- After adding the OST, move to the File menu>> info and mailbox cleanup then select the Archive.

- Now check on the “Archive this folder and all subfolders” and select the date in the Archive items older than an option.

- Once it has been done browse the location to save the Archive PST file on the device.
- At the end hit on the Ok button.
After all these steps, the outlook OST data will be easily converted to PST format.
The points to be remembered:
The manual procedures will not work in the following situations.
1. In case the exchange server is offline.
2. OUTLOOK is not working properly etc.
3. If Outlook doesn't install on the user's device.
Best Method to Convert OST to PST.
Download eSoftTools Convert OST to PST Software to perform conversion of offline OST to working PST format in a few simple steps. Simply utilize this tool to exports emails, contacts, notes, tasks, calendars, and much more from OST into PST format. It has the ability to convert corrupted, orphaned, and IMAP OST file into accessible PST file format without using much effort.
Unique features of OST Conversion Tool.
- The damaged or inaccessible OST files are recovered as well as repaired.
- Makes the conversion of OST file to PST, EML, EMLX, MSG, vCard, CSV, MBOX, HTML, ICS file formats.
- Has the capability to Export OST to Office 365 account
- It is an easy to use interface specially designed for non-technical persons i.e. person without any technical knowledge.
- The data is easily converted without any change in the data or data loss.
- It supports all the versions of MS Outlooks like 2016, 2013 outlook as well as the lowest versions.
- Offers Demo version which allows converting OST file with a maximum of 25 mailbox items from per folder to each file format without any charges to check the efficiency and working of the tool.
Working Video of OST Converter:-


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