If you want to switch Outlook express DBX file data into Outlook PST format then you are at the right place. Here I suggest all the users to read the article of the blog link: https://goo.gl/YF9WxR which contains the information of two popular manual methods - Import Emails to Windows Live Mail and Export Emails to Outlook, you can select any one of the method to import all your DBX file data into PST file format. Both these methods are very simple that any users whether they have technical knowledge or not can use it without any difficulty.

Hope this information will help you.