good day for all,

Some days ago Outlook tells me that my .pst file cant be recognized as .pst file or corrupted.

What does this mean? Can I recover .pst file manually or have to use paid software?

If someone knows, please inform me. I would be appreciated.

Backups? The data should still be stored in non-encrypted form, so you may be able to use some sort of editor and extract each message to an external file. Very time-consuming and a major PITA, but I have seen where this is the best solution, unless, as you say, you want to pay for a tool to do this for you.

how big your pst file ? it's more then 2.4 GB ?please try repair it with scanpst
it will take time, and seem like not responding