I can do free easily online recovery OST to PST tool
If anyone looking for powerful solution to export all the mailbox data from OST file to PST file formats. In this situation, just download and install ATS OST to PST Converter Software that provides advanced features to convert unlimited size OST file to PST with all the mail items including – calendars, tasks, emails, notes, drafts, contacts, images, sent items, appointments, and many more items. It is eligible to recover all the data from harmed or damaged OST files to healthy PST Outlook formats without any data harm issues. The clients can export their OST into multiple file formats – PST, MBOX, MSG, EML, EMLX, PDF, Office365, and many more.