Sometimes user lost their OST data and cannot able to access that particular file again. In this situation, I suggest you download ATS OST to PST converter application which has the feature to access permanently delete data in a couple of clicks. this application helps you to convert your OST file in many formats like PST, EML, EMLX, vCal, vCard. HTML, etc. its backing with MS Outlook version 97, 98, 2000, 2002, 2003, 2007, 2010, 2013, 2016 and 2019. It was also compatible with the Office365&live exchange server. it also provides 24*7 technical support to their use for the best result.