The eSoftTools Outlook Recovery Tool is the best approach to importing a PST file into Outlook 2010. A large PST file can be broken down into multiple smaller files ranging from 1 GB to 25 GB in size. The app's user interface is straightforward use. It's easy to combine non-technical and technical skills. PST files can be imported into the software's trial edition. You can convert up to 25 emails per folder in the trial edition.