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Know-How to Backup Outlook OST File to PST

Are you encountering trouble with the OST file errors? Still wondering how to backup Outlook OST file to PST? If the answer is yes, then don't worry as we have discussed how you can resolve the problem and backup your Outlook OST files to PST smoothly. Microsoft Outlook supports two file formats that are, OST and PST to store data. Setting up Outlook with Exchange Server copies the mailbox data on the user's machine in OST file format. The user can use the mailbox files even when there is no internet connection.

However, some problem occurs in the OST files as it gets corrupt, inaccessible and the overall performance of the OST files is also affected. The user can eliminate the issues associated with the OST file and back up their OST files to PST and avoid losing any data. Below we have discussed a few important reasons why a user needs to back up their Microsoft Outlook OST files to PST format.

Why Do You Need to Back Up Your OST Files to PST?

  • Deletion of the Files By Mistake
  • Most of us make the mistake of deleting the data, and if there is no back up it is a serious problem. If the user has a backup of the files, then it can be restored and you can avoid the risk of deleting the files permanently.

  • File Gets Corrupted
  • There is a very high chance of OST files getting corrupted. The files can get corrupt due to many reasons such as synchronization problem, the server breaks down, and virus issues. If the OST files are highly corrupted or damaged, then the user might lose the data permanently. However, if there is a backup of the OST files, then it can be restored.

    There are various ways to back up the OST files to PST in Outlook 2013, 2016, and 2019. We have discussed a few ways to backup your OST files to PST file format.

  • Move OST Files As PST
  • Make certain that Outlook is running on the machine and it should be connected with the Exchange Server.

    1. Open Outlook and click on 'File Menu'.
    2. Now, click on 'Open and Export' option.
    3. Then click on the button 'Export' and select the files you want to export and click on the 'Next' button.
    4. Choose the location you want to export the files and save the PST files.
    5. Now, click on the 'Finish' button.
  • Export OST Files to A New PST
  • The user can back up the OST files to PST format by exporting the OST files to a new PST file. Below we have mentioned the steps to move the files to a new PST:

    1. Open 'Outlook' and make a new PST file.
    2. Now, drag the folders you want to move from OST files into a new PST file.

What Can The User Do When The Outlook Is Not Installed On The System?

If you don't have Outlook installed on the system, then we highly suggest you opt for KDETools OST to PST converter. By using the advanced software, the user can back up the highly corrupted or encrypted files without losing any data. The efficient tool can convert OST mailbox data, such as attachments, calendar, notes, journals, contacts, and folders. The OST to PST converter can restore the properties such as subject, images, to, from, date, and attachments.

The OST to PST converter can convert into multiple file types such as MBOX, EML, EMLX, MSG, PST, vCard, and vCal. The user can restore the deleted and permanently deleted OST files. The advanced tool enables the user to take a free preview before the conversion process starts.


It is highly suggested to back up your data and avoid the chance of losing the files permanently. You will find various ways to back up your Outlook OST files to PST so ensure that you select a reliable way.

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