Do you want to import Outlook OST files to Windows 10 Mail, so you have to download eSoftTools OST to PST converter software? This software has multiple file formats for conversion. This software imports emails with attachments. This software has a preview option. Users can get a preview of the OST file before the conversion of the PST. This software has technical support and all users get help by email or live chat. This software converts the OST file into PST.