How to open OST in Outlook? How to open OST in PST? All these questions will be answered in the following steps of OST Recovery software. These steps are one-after-the-other in sequence. So, you have to follow them stepwise and execute them step-after-step as mentioned below. The screenshots give you a better understanding of the whole thing, so watch them and view them very carefully and note down the important aspects about the process and interface appearance after each step.