How to Convert .OST to .PST Format: Is This Your Query Too ?

I had a problem to use my system hard disk, so I had taken data backup to use in an another hard disk. When I changed my system hard disk and copied my data to it, I found that my PST file is changed to OST format. When I try to open my Outlook data file, I get an error like ” the file you have chosen is not an Outlook file” Try how to open this? Or how do I convert .ost to .pst?

Microsoft Outlook allows users to access only PST file and the Outlook cannot access the OST file. The primary difference between Outlook (.PST and .OST) is that Outlook (.PST) file used for POP3,IMAP, and web-based mail account. And Outlook (.OST) are used when you have Exchange account and you want to work offline.

OST file is not an Outlook Data file, it is an always copies of items that are saved on your exchange server mailbox, means it has not a backed up like an Outlook Data file (.pst). OST files are used if you have an account on MS exchange Server and want to work offline with the use of default Cached Exchange Mode. OST file is an offline Outlook data file provided by Microsoft Exchange Server that allows users to work with their mail data even when you are not connected to the mail server. When the server is connected, all the saved email and information is delivered to respective client without delay.

OST file is an offline or cached Outlook File

OST generates a local copy of exchange mailbox on your computer and is stored the following default location according your operating system

Win8/Win7/WinVistadrive:\Users\username\AppData\Local\Microsoft\Outlook
WinXP: drive:\Documents and Settings\username\Local Settings\Application Data\Microsoft\Outlook

When your account server synchronizes .ost file on your system to keep your current Outlook items and all the data in the .ost file is saved on the server, so you don't have to back it up. If your OST file occurred problem to synchronize with MS exchange server or your offline (.ost) file is damaged then you can use in-built repair tool (scan .ost) to fix it.  If your OST file severely damaged then scan.ost tool will not be able to fix the error issue. In that case, you need to convert .OST to .PST format with the help of an effective Microsoft OST to PST Conversion Tool . 

Microsoft OST to PST Tool can repair corrupted/damaged OST mail files during the conversion process and then import OST file into Outlook PST format.