Best Method to Save Attachments from Multiple Emails in Outlook?

  •   Written By
  • Published on
    September 7th, 2022
  • Updated on
    October 14, 2022
  • Read Time
    12 minutes
Summary:-MS Outlook usually stores its cached data when you work in an offline mode on a local machine in the form of an OST file. Any amendments made in the offline files result in a change on the online MS exchange server later when an online connection is established. In case of an exchange server crash, the offline OST files remain unaffected and the data can be restored later. So for restoring Offline mailbox items, you need to convert OST to PST and upload OST files on the Outlook server. Here you can see the various techniques to convert all the emails with attachments of an OST file to PST in Outlook 2019, 2016, and 2013.

What are OST and PST files in Outlook?

Exchange OST Files: MS Outlook stores Offline Outlook Data File ( or OST) format for synchronization with Exchange Server. It contains the essential data that you can easily access online and offline too. You can work offline because of its top-notch synchronization provided by OST files that fluently get synchronized with the server data even if the MS Exchange Server is not connected. Ordinarily, when you utilize a Microsoft Exchange Server account, your email messages, schedule, and different items are conveyed to and saved on the server. The OST document is synchronized with the Exchange PC when a connection is accessible.

Outlook PST Files: Personal Storage Table( or PST) contains your email messages and other Outlook items and saves them on your computer system. It helps to move or copy emails, attachments, and other items from your Mail server account to your computer. Home clients normally use an Internet service provider (ISP) to get linked over the Internet. The ISP additionally offers at least one email account. The most widely recognized sorts of accounts are mentioned by their web protocol names — POP3 and IMAP. Another kind of account is an HTTP or online account that works like an IMAP email account. Each of the three account sorts utilizes a PST document.

Need for OST to PST Conversion

  • Sudden Exchange Server Crash: You may face an Exchange server crash due to virus attacks, power supply failure, corrupt software, etc. Once your server crashes, you may unable to connect to the MS Exchange server.
  • Pop-ups OST Files Errors: As we all know, the mailboxes that store various data items in OST files, work after synchronization with MS Exchange Server. Unfortunately, due to some issues, OST files may get corrupt and the error message starts popping up on your screen to notify you that your OST files is not accessible. So, to open and view the corrupt OST mail items, you require to convert OST files to PST format.
  • Job Switching: When users left their old employer, they try to forward all the OST files to another account. But, they forget to realize that their all files are synchronized with Microsoft Exchange Server and can’t be accessed from another account. To access the OST files on another account, firstly you need to export the OST file to Outlook PST format.
  • Corruption of OST Files: MS Outlook offers a facility in OST files that can be viewed and edited online as well as offline. But sometimes, Offline OST files may get corrupted due to abnormal termination, server breakdown, lack of storage space etc

Free Techniques to Convert OST Mailbox to PST File in Outlook

I’ll discuss the various methods of OST to PST conversion which will help you to upload all offline data OST File into your Outlook account.

Re-Create an Offline Outlook Data File (.ost)

OST Files have copies of Exchange information that’s why it is not necessary to backup .ost files. Users can create a new copy at any time. Follow the steps:

  • Click ‘File>>Account Settings‘ twice, and then choose your account from the resulting window.
  • Select ‘Change‘ from the toolbar, and then tick the ‘Use Cached Exchange Mode’ check box under Offline Settings.
  • Click ‘Next>> click ‘Finish‘ to create the OST file on your hard drive, and then restart Outlook for your changes to take effect.

Convert Offline OST Mailbox to PST

First, you must log in to your Outlook account using the exchange server from where the OST files have been created and export OST to PST follow the steps given below:-

  • Go to the File tab click on the Open & Export and then select the Import/Export option.
  • Now, Click on the Export to a File option and then click on the Next Button to Continue.
  • Select Outlook Data File (.pst) option and then click on Next.
  • Select any Folder(s) which you want to export and then click on Next.
  • Now, you should Browse the Location where you want to save the PST Files. Then select the appropriate option for Removing or Adding Duplicates items.

You can also apply a password to the newly created PST file for security reasons.

Use Archiving  Technique to Change Offline Outlook Mailbox to PST

Archiving option saves the items of an OST file into PST file format in the archive folder. Enabling the archiving option will enable you to save Offline Mailbox data in the archive folder to implement this option follow the steps given below:-

  • Open the Outlook application and go to Options under the File tab.
  • Go to Advanced Settings and Click on Auto Archive Settings.
  • Select the Number of Days on the intervals at which Auto-Archiving takes place.
  • Browse the Location where the email has to be saved and click on OK.

After configuring the above settings, the Outlook Application will archive the emails on the preferred location on the intervals of Days mentioned by you.

Convert OST to PST Using Drag and Drop Method

  • Open the MS Outlook application 2019, 2016, or 2013 on your system.
  • Then create a new PST file in Outlook Profile you have recently opened.
  • Now drag all the OST mailbox folders you want to convert to PST, to the newly created Outlook file.

Remember that the Drag and Drop option will not drag the items present in the Inbox, Contacts, etc default folder.

Convert OST to PST without MS Outlook

The only possible way to save OST as PST without an exchange server account is OST to PST Converter. This is a professional tool and has a lot of features. It will help you to export OST to PST without losing a single data from the file. If you have less than 25 emails, you can convert them for free. The intuitive GUI will make it much easier for you to turn an OST file into PST.

Export OST Mailbox to PST without any Technical Expertise

  • Download and then Launch OST to PST Converter Software.
  • Click on the Open button and then Browse the OST file you want to Convert.
  • The Scanning Process will start and you will be able to view all the Mailbox items of the OST file.
  • Select the Mailbox Items which you want to save and then click on Save Button.
  • Choose the location where you want to save the OST files as PST.
  • Now, the Saving Process starts and you can see the progress on the Screen.
  • After the completion of the saving process, you’ll receive a Confirmation Message.

Finally, you have converted all Mailbox items of an OST file to PST.


Well, for OST to PST conversion you can follow the manual methods as well but they are not easy to follow for a novice user. It is totally up to you which method of conversion you follow and save the offline mailbox to PST. If you are using the SysInfoTools OST to PST Converter software then you must forget the risk of data loss because this software never fails to convert every single item of OST to PST. I hope you liked this article.

Note:- Check the OST to PST Converter Video for a Quick OST to PST Conversion.

Frequently Asked Questions (FAQs)

You can clear all your doubts through the questions asked by our readers in the context of this article.

Q1. How can I Move OST File Emails to PST without Outlook?

A1. If you want to move OST file emails into PST without installing Outlook, then use the Automated OST to PST Converter tool mentioned in the article.

Q2. How can I import OST to PST using MS Outlook?

A2. You can follow the steps given below to import OST to PST through MS Outlook:-

  1. Start by opening the MS Outlook application.
  2. Then select “Import and Export” from the “File” menu after opening it.
  3. Click “Export to a file” and “Next” in the following window.
  4. Select the Outlook data file (.PST) and press “Next.”
  5. Choose the mailbox folder to export an OST file to a PST file.
  6. Click “Finish” after browsing and selecting the folder where you wish to keep the PST file.

Q3. Why are OST Files Created?

A3. In offline mode, the OST file represents the local cache of your Exchange account. The OST files are created when users are offline or not connected to the Internet.

Q4. Can I Open an OST File in Outlook?

A4. Yes, you can open an OST file in Outlook with the help of this write-up.

Q5. What is an OST File?

A5. An offline folder file in Microsoft Outlook is an OST file (.ost). Users can work offline and synchronize changes with the Exchange server when they next connect, thanks to offline folders. Working offline is advantageous in settings with poor or unstable connectivity.

Q6. Can I Change the OST File Format to PST?

A6. Yes, you can easily change the OST file into PST format. You can either follow the manual method or use the best OST to PST Converter Tool for the conversion.

Q7. Will the above methods also convert OST to PST in Outlook 2013 and Outlook 2016?

A7. Yes, with the help of the methods mentioned above, you can easily convert OST to PST in outlook 2013 and also in Outlook 2016

Q8. How Can I Convert OST File to PST Online?

A8. Follow these methods to convert the OST file to PST:-

  • Re-Create an Offline Outlook Data File (.ost)
  • Use Outlook’s Export/ Import Method to convert OST files into PST.
  • Use Archiving Technique

Q9. Why should I use OST to PST Converter for converting OST Files to PST?

A9. The manual methods have certain limitations and that’s why experts have recommended using the OST to PST Converter. It is an exclusive solution to convert multiple OST files into PST format. Moreover, the tool offers multiple advanced features while performing the conversion process.

Q10. What would be the conversion accuracy in OST to PST Conversion?

A10. If you want 100% accuracy in OST to PST Conversion process then OST to PST Converter is the perfect solution for you.

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