>Unfortunately Thunderbird will not work with the .pst files. And from what I found no other product (aside from Outlook) will work with pst files. Too bad. MS has thousands if not millions of unhappy customers who would gladly pay up to use a product compatible with the pst files.

Dmitry,

Search for Outlook PST file convertors:

This one will convert to Thunderbird:

https://www.coolutils.com/blog/5-easy-ways-to-open-pst-file-without-outlook/

Others:

https://www.arysontechnologies.com/pst-converter/

https://helpdeskgeek.com/office-tips/how-to-bulk-convert-outlook-pst-files-into-another-format/

etc.