If you are searching for an affordable converter to OST to PST format then users should use this SameTools Convert OST to PST Software with a smart Graphical user interface that provides the ability to safely convert all data of OST emails, contacts, calendars, journal tasks, drafts, notes, and attachments, etc. and convert into a new desired format that is PST. There is no need to download Outlook or another extension to use it. Users can convert Outlook 2021, 2019, 2016, 2013, 2010, 2007, 2003, etc., and install it on Windows 10, 7, 8, XP, Vista, etc. All users have a free demo to convert a few OST files safely with the user's selective data into PST format
Visit here: https://www.sametools.com/convert/ost/

With the help of MailsDaddy OST to PST Converter users can easily convert OST files into PST format. Using this advanced solution users can quickly convert OST files into PST, EML, MSG, MBOX, RTF, Office 365, Live Exchange Server, and others. It provides unique PST files that can be easily imported in all Outlook versions.
Read More: https://www.mailsdaddy.com/ost-to-pst-converter/

I know about the most reliable solution which is an affordable tool try with ToolsCrunch Mac OST to PST Converter Tool, that can easily convert your Offline OST files to Outlook PST files with easy steps. It directly imports the OST files without any type of data loss or damage to the original file structure and properties. It comes with a user-friendly GUI which makes it easy to use even for non-tech users also. Users can work with this software on all Windows OS & Mac OS versions. Users can install the free demo version to convert a few OST files into PST without paying money.

The ToolsBaer OST to PST Converter Tool is an affordable OST to PST converter for an Outlook OST and PST file, preserving all attachments and including all emails, contacts, calendars, tasks, etc. You can convert a large OST data file into PST format without any data loss because there is no file size limitation before converting the OST file, it will request user consent and the location of the data store, here users will get the full file preview option. This tool can work with MS Outlook 2021, 2019, 2016, 2013, 2010, 2007, and 2002, and immediately function with this OST to PST converter. Users can convert all versions of Outlook's OST files are completely supported, and Windows 11, 10, 8.1, 8, 7, XP, and Vista are all supported as well. Users can download this application for a free demo.