I think you want to export OST to PST with the best conversion tool, so use the eSoftTools OST to PST converter software. It can effortlessly convert or export OST to PST, EML, MSG, office 365, IMAP, MBOX, Gmail, Yahoo, EMLX, HTML and vCard and other
variety formats in one easy step. It has a splitting option, with the splitting option you can split a large PST file to unlimited small size PST file without any difficulty. For checking software activity, you can try the free demo version provided by
this tool.
Know more:-
https://www.esofttools.com/ost-to-pst-converter.html
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