With the help of OST to PST Converter, all users may safely restore and convert Offline OST data to Outlook PST files. To learn how to restore an offline OST file and import OST data into Outlook, download SysInspire OST to PST Converter Software. This application always exports OST emails as fresh Outlook PST emails, complete with all to, cc, bcc, and from addresses, as well as the date and time information. The OST files can be converted to PST files for Outlook. It also works with all Windows and MS Outlook versions. To move a few emails for free, use the converter's free demo version.
Read More:- Free OST to PST Converter

Use this most famous SoftMails OST to PST Converter software. This is the anti-virus software with user –friendly interface which can make the tool easy to use. Users can import the OST file to PST, and several other formats like HTML, MBOX, Yahoo, Gmail, Office365, Zimbra, vCard, EML, EMLX, CSV, ICF, MSG, etc. This is able to display the entire preview of OST file items before the conversion such as emails, deleted files, contact, calendar, tasks, notes, chats, attachments, appointments, etc. This software is available for free and you can download the free pack from the official website of SoftMails.
Read More:- Import the OST file to PST
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.