One of the best and most effective solutions to export OST to PST is the MacSonik OST to PST Converter, which has simple features that even non-technical users can utilize. This software can convert OST files into multiple file formats such as EML, PDF, MSG, DOC, MBOX, CSV, TXT, etc. It helps you to split the resultant PST file if it is too large and has a huge OST data. Apart from this, the software gives you a date range filter option that allows filter emails based on date.You can convert specific OST emails to PST within a defined date.