The eSoftTools OST to PST Converter Tool is a useful tool for recovering data safely. The OST Converter Tool converts OST files to pst, mbox, eml, emlx, and HTML file formats without making any changes to the original data and offers a free trial pack so that customers may learn more about the software's features. The size of files that can be converted is unrestricted. The HTML layout and folder structure are preserved.
Read More:- Convert OST to PST files
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.
Hope this helps, J Wick