How large is your .pst file???

>Hi,
>
>I have tried to fix corrupted .pst files of Outlook 365 using MS too SCANPST.EXE. But next day I get the same message of corrupted files.
>
>I am considering buying this tool:
>
>http://www.sysinfotools.com/recovery/pst-recovery.html
>
>Anybody used it and what were the results?
>
>TIA