As a user, you can download the trial version of OST to PST Wizard software and check the functionality of the software. Its shows the working process of the software but it doesn’t restore all items of the OST file. It restores only 20 items per folder. We can say that the trial version of the software convert OST to PST only 20 Items per folder of the OST file. If you want to fully covert OST to PST and restoring complete OST file then you have need to purchase the software and convert the trail version to full version of the software.