The best way to import a PST file into Outlook 2010 is to use the eSoftTools Outlook Recovery Tool. A huge PST file can be divided into several smaller files ranging in size from 1 GB to 25 GB. The user interface of the app is simple and easy. Combining non-technical and technical talents is simple. PST files can be imported into the trial version of the software. In the trial edition, you can convert up to 25 emails per folder.