How to change OST file to PST file format. Is there any manual method available or I should use a converter to get all data in PST format. I have a large amount of email data in my outlook 2016, So suggest me the best option. 
Many types of tool are available in the market, its help to convert easily and fast OST to PST file format. But many tools deleted and corrupted your file. I suggest you, use Repair OST to PST Converter tool. you can convert all email file OST format save in PST file format.
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You can very effectively conversion OST file information and restore OST File into PST, EMLX, MBOX, EML, MSG, HTML, VCF, and Export to Office 365 format using this amazing SysInspire OST to PST Converter software. It effectively converts the particular folders from OST file with keeps up all emails formatting and attachments. Software supports to all MS Outlook version up to- 2019.
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You can easily download the OST to PST Software which promptly OST file and migrate Outlook OST file into PST file in just a few minutes. The tool securely converts all mail items of OST file and saves them in new Outlook PST file, along with giving a possibility to save as EML, MSG, EMLX, MBOX and HTML file formats. Read more:
If you are using Mac OS then you should try this Mac OST to PST Converter which surely recovers and convert your OST files into Outlook PST on a Mac system. To download the software visit:-