Here is the best DataVare OST to PST Converter Expert is the quickest method for exporting offline OST files to PST files. The OST to PST Converter will then easily access your OST files as PST files. Don't wait, download it now. This application can change multiple Outlook OST files into PST at the same time. User can check a preview of their email data from Outlook OST files to PST format before the conversion process starts. It also keeps all the data formatting intact. You can obtain all data with email attributes. It doesn't change or alter the quality of your source file either. There is no limitation on the file size of the OST mailbox to migrate into PST. Users can simply transfer large amounts of EML files to the PST file format without losing data. This utility can work independently and perform conversion without having to run MS Outlook. This utility can move OST to PST for both skilled and non-skilled users. Download the demo edition to check its working. Refer: https://www.datavare.com/software/ost-to-pst-converter-expert.html