To convert OST files to PST format, I suggest using Aryson OST to PST converter. The GUI is so simple that the tool requires no technological expertise. OST files can be converted to a number of different file types and email clients, including MBOX, MSG, CSV, Gmail, Yahoo, and Thunderbird.
https://www.arysontechnologies.com/convert-ost-to-pst-online.html

To convert OSt to PST, follow the instructions provided:
1. Install and run the Aryson OST to PST converter tool.
2. Click the Add file button to add the OST file.
3. Hit the OK button until the scanning process is completed.
4. Before converting the file, preview the OST mailbox.
5. Tap the Save button and select the destination, then click the OK button.

The two file formats used by MS Outlook to store emails are OST and PST. When using Outlook in offline mode, or without an internet connection, all of the offline emails are saved in the OST file format but MS Outlook stores the data in PST file format. In that case if you want to import your OST file into Outlook, then you have two methods: a manual method and automatically. When using manual techniques, users run the risk of losing data and wasting a lot of time. As a frequent user, I suggest using the OST to PST Converter Tool in that situation. It works well and is trustworthy. Without losing the file, you can quickly attach it.

For more info, visit here :- https://www.freeviewer.org/ost/pro.html

I am here with a blog where you will get a list of top 5 OST to PST converter you can try the best form all and you can even try the free demo version of the software. As there are manual methods that are less secure for non-technical users.

Read here: https://www.sysinfotools.com/blog/top-5-best-ost-pst-converter-tools-2019/

I have recently found an informative write-up that explains the detailed manual methods about how to convert OST to PST manually. This article will explain the following methods:

1. Archiving OST Files.
2. Export OST data into PST by using Import and Export option.
3. Moving the file items to a new PST file.
4. Forward by email.

Additionally, this article also introduced an automated tool that is recommended by many experts to convert OST files into PST.

Get more info: https://www.mailconvertertools.com/blog/how-to-convert-ost-to-pst-manually/

Convert OST to PST Manually

- Open Outlook and go to the File menu.
- Select the Import/Export option.
- Choose Export to a file.
- Select Outlook Data File (.pst)
- Choose whether to export a specific folder or the whole account.
- Check the Include subfolders box.
- Next, select a destination for the Export, and then click Finish.

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If you are searching for an excellent resolution to recover the unexpectedly deleted items from the Outlook OST file in Outlook 2016 So you can quickly use the most trustable utility name as eSoftTools OST to PST Converter Software. This tool will efficiently recover all damaged OST file data including- E-mails, Chats, Contacts, Appointments, Inbox-Outbox items, Drafts, Sent Items, Calendars, Tasks, Notes, Journals, etc. It will smoothly repair corrupt OST files only just on minimum numbers of clicks and also turns the OST file into various varieties of file formats like- Office 365, MBOX, CSV, EML, MSG, and vCard, HTML, PST Outlook. All variants of MS Outlook are supported by this software such as 2000, 2003, 2007, 2010, 2013, 2016, 2019 and it does not need the installation of MS Outlook for performing the conversion. A FREE DEMO version is also allowed for all users by which the user can switch OST files with selective 25 emails into all formats free of cost.

Read more:- https://www.esofttools.com/ost-to-pst-converter.html

Hello! Dear user hopes you are doing well, I am sharing with you a great and affordable DRS Convert OST to PST software that can easily convert your OST file into Outlook PST formats. DRS add some new features on its own software, this is amazing features. It is too fast and reliable software. Using this software a lot of users get a free trial version. You can download this software easily.
know more:-https://www.data-recovery-solutions.com/convert-ost-to-pst.php

OST to PST Converter Tool is the greatest and reliable app, that allows users to convert single or various OST files to Outlook file format. By using these tool users can easily convert all OST files into PST file format without any technical knowledge. The client can save the OST files into a few unique formats like EML, EMLX, MSG, and MBOX. Users can use the tool on all MS Outlook and perform the error-free conversion from OST to Outlook PST format. The software works smoothly with all the versions of Microsoft Outlook 2016, 2013, 2010, 2007, and 2003, etc.

More info:- https://www.sametools.com/convert/ost/