Try PDS OST to PST Software for converting the OST information into PST. Convert OST files into multiple formats like PST, EML, PDF, MSG, MBOX, ICS, VCF, Gmail and Office 365. It's very easy to use and doesn't require any tech skill for run. It facilitates users by excluding attachments and duplicate emails from the conversion process. You can also use the filter option for selecting the emails that you need to convert. To check its efficiency, you can download the free demo version and convert 30 emails per folder for free.