Advance Method and Simple Steps to Convert OST to PST for Outlook. How to use the software to convert OST to PST? To export OST files to a variety of other saving formats, carefully follow the steps below:. Install and Run the SoftwareImperial OST to PST Converter . Select your OST file by clicking on the Single file or Multiple Files/Folder buttons. Following the addition of OST files to the software, click Next. Click the Next button after selecting the folder from the tree structure. Now, under the Saves/Backup/Migrate As menu, select the PST file format. Examine the built-in features to determine if they meet your requirements. Assign a target path to the new folder that results. To begin the migration of OST to PST format, tap Convert. Finally, you can save the conversion log report. How can I convert an OST file to a PST file online using a date range? Follow the OST Migration's steps below:. Install the SoftwareImperial OST Converter Tool from the So...