vMail OST to PST Converter can help you to finish your converter work in just a few minutes without any hassle. This tool has all the features that you need for data conversion. You can see the preview of the conversion with the help of this tool. You can also use this software on different platforms like Windows OS 95, NT, 98, ME, XP, Vista, 7, 8, and 8.1,10 (32bit & 64bit) and can also work on Windows OS 95, NT, 98, ME, XP, Vista, 7, 8, and 8.1,10 (32bit & 64bit). This tool can support various types of formats like PST, EMLX, MBOX, EML, HTML, MSG, vCal, vCard. You can also try the free demo version of this software to convert the 30 emails for free.

Know more info- https://www.vsoftware.org/ost-to-pst-converter.html
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.