Hey, have you tried the OST to PST converter from EdbMails? If not, then you must definitely try it. It offers a free demo version to try out all the features and you can download it directly from the website without any credit card or payment details. Also, you can contact EdbMails free 24/7 live support anytime even when you are using the free trial version. Last week, we requested for a free personalized demo and their excellent and friendly customer support walked us through the entire product. You can recover an OST file easily and convert it to PST with its rich GUI. It displays all the mail items similar to Microsoft Outlook where you can see the individual contents. Such a relief when you have a badly corrupted OST file that you are unable to open! To know more : https://www.edbmails.com/pages/ost-to-pst-converter.html