If you are looking for the best OST to PST Converter software then you can try most effective
ZOOK OST to PST Converter software. It is well developed and self explanatory interface having tool. It is capable to convert large sized OST files to Outlook PST files. The software allow users to convert highly corrupted, damaged or orphaned OST files. It is supportable to all versions of Outlook and Windows OS.
Visit here for more info-
https://www.zooksoftware.com/ost-to-pst/