I need repair pst in my mail faster

Question

I try to import pst file, but it says "invalid file format." File - .pst. Why I can't open file? I need repair pst in my mail faster.

Answer 1

Based on the error information, your PST file should be corrupt or damaged. You should first check the size of the PST file,
1. If PST file size is 0. Then your PST file does NOT contain any recoverable data. You should check the source of the PST file and make another copy, or obtain a backup from your backup media. If you cannot get another copy, then you can find
out the media where you have stored your PST file in the past, for example, an external USB drive, and try
DataNumen Outlook Drive Recovery to scan and recover the data from the drive directly.
2. If PST file size is not zero, then it is still possible that some data are existing in your PST file and you can recover them.
There are a lot of online resources discussing about how to recovering corrupt or damaged PST files.
First, the Microsoft offical tool scanpst, also called Inbox Repair Tool, can repair the PST file, you can refer the following articles:
http://office.microsoft.com/en-001/outlook-help/repair-outlook-data-files-pst-and-ost-HA010075831.aspx
http://support.microsoft.com/kb/272227
https://support.microsoft.com/kb/287497
Second, a lot of Outlook MVPs also discussing this topic on their own websites:
http://www.msoutlook.info/question/77
http://www.slipstick.com/problems/pst-repair/repair-a-damaged-personal-folders-pst-file/
Third, there are many third-party Outlook recovery tools you can try, below is a list of them:
http://www.datanumen.com/outlook-repair/compare.htm
Nearly all these tools provide a free trial so you can try first to see if a tool works before purchase it.
Good luck!