PST is not a outlook data file error


I have used Outlook 2013 to export IMAP emails from Gmail account, and I have successfully exported each month of email into separate PST files so that I can move these PST files over to another computer.

I need to import these PST files into Outlook 2010. But some PST files are showing error message as below. I can import these pst files back into Outlook 2013 and they work fine but when they are moved to Outlook 2010 some PST files show the error message.
PST Error
The reason I need to import these into Outlook 2010 is that we are in the process of migrating gmail to Exchange. I also need to make all email as PST files so they can be stored in a file server where computers can import them into their outlook whenever they need.
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The format of PST file has not changed. If you can read a PST file in Outlook 2013, you can read it in Outlook 2010. Can you verify that the pst file is not a read only file or not on a read only drive.
The pst file can be corrupted, but the corruption can disturb Outlook 2010 and not Outlook 2013. You can try to do a scanpst of the file to check and repair it.

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HariomExchange ExpertsCommented:
May be the PST file is corrupt , You’ll have to open the Scanpst.exe utility that’s included by default with Outlook to repiare the PST file

Make copy of pst file before repairing
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