Manual method for the conversion of OST to PST

Open the MS outlook 2013 in your system.
Now click on the File tab and select Open and Export option.
Go to Import/Export after clicking on "Open & export option".
With click on the import/export option, a dialog box will pop-up in which select on "Export to a file" as shown in the figure below and click "Next" to proceed forward.
Now click on Outlook data file (.pst) and click "Next" to move further with the process.
Now, Select the folder to export from/by selecting the files required to export and select Next.
Now, click on "Allow duplicates to be created" to export the files and then click "Finish" the program
After finishing the program a dialog box will pop up which will ask to add an optional password. Click OK and the Outlook Profile will be saved to PST file format in your allotted location.