Get the benefit of this free tool eSoftTools Free OST to PST Converter software. This tool allows converting Outlook OST file into PST with emails, contacts, calendar, contacts, drafts, and etc. It also provides many types of file formats to convert Outlook OST files such as Office 365, Gmail, Yahoo, ICS, MSG, HTML, MBOX, Zimbra, EML, vCard, and EMLX. It properly works in all Windows OS and MS Outlook versions. For fast conversion, it gives a bulk conversion option. Visit the official website of eSoftTools.
Read more- Best Free OST to PST Converter

I tried many OST to PST Converter software but didn’t get a satisfactory result then one of my friends suggest me the PassFixer OST to PST Converter software and that will give me the exact result of Outlook OST file without making any problem or without any difficulty or alteration. It is enabled to display a live preview of OST file items before the conversion. It will fix all kinds of errors. This tool can easily export OST to PST formats and many other formats. Know more from the official site of PassFixer.
Read More:- Export OST to PST formats
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.
This will help you, J Wick