If you need to import a PST file into Outlook 2010, I have a solution for you. It's known as
eSoftTools. Outlook PST Recovery Software is a straightforward application. This is where you'll find the split option if you want to split a large PST file into several smaller files. This software has a demo version that allows you to import PST files. In the trial edition, you can convert up to 25 emails per folder.
Visit here:- Import PST File into Outlook 2010