You can use ost to pst converter software which easily works to convert single or bulk ost files to others file formats without any size limitation. It can also provide a free demo pack to all users to check its working process. You can successfully export ost data to PST format with the outlook ost to pst converter online tool. Its tool to import ost to pst file, OLM, Gmail, Office 365, live exchange server, EML, EMLX MSG, MBOX, HTML, vCard, vCal, olm, PDF, and, etc. The ost to pst file converter software to split large pst file. along with its tool to export file/folder from ost to pst file.