Convert OST file to PST file format with this amazing utility Regaintechnologies OST to PST Converter Software that can Convert OST to PST file format including email, draft, task, attachment, notes, contact, sent item, delete item, calendar, etc. This tool also provides the features to split the PST data into smaller bits and also shows the preview of the conversion. User can also save their OST file into multiple file formats like: PST, EML, MSG, MBOX, HTML, ICS, VCARD and Office 365 Platform.