OST to PST Converter
OST files, including addresses, inbox, sent objects, drafts, delete-items, attachments, calendar, notes, and tasks, can be converted and recovered by using eSoftTools OST to PST Converter. After the conversion, you can restore the resultant file using various file formats such as PST, EML, MSG, MBOX, vCard, and so on. You can split large PST files into smaller parts if required. You can also view the show of the conversion before it is done. The free demo version of this tool can convert 25 emails in ost to pst file format.
Read more:- https://www.esofttools.com/ost-to-pst-converter.html

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Kiran Sharma commented
Use the MacSonik OST to PST converter for mac to convert OST to PST file format efficiently and with high data accuracy. It has a mail filter feature that allows to convert emails of specific dates. It maintains data hierarchy and data security throughout the conversion process. Additionally, it also provides an option to split the resultant PST files if it is large in size. The OST to PST converter enables converting OST files to multiple file formats and email clients efficiently without losing data integrity.
To know more- https://www.macsonik.com/ost-pst-converter/
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shiv gupta commented
I would like to suggest Kernel for OST to PST Converter software. It can easily and quickly repair damaged OST files and convert them in PST formats. The software also supports to save OST files in PDF, MSG, EML, RTF, TXT, HTML and DOC files. To know more about the software, visit: https://www.nucleustechnologies.com/ost-to-pst-converter.html