Go to Start » Programs » Open OST Recovery Software:
To select the OST file, click on ADD File button as highlighted below
As you click on Add file button, a small window will pop up and you need to browse the OST file location from machine.
Select any one of the OST files from the folder. The size of OST file has no limitation as you can see in image that the selected OST file is quite large in size.
After adding the OST file, software will perform a quick scanning of file to recover the data from the OST file Or If your OST file is corrupt, then Quick scanning won't give precise results and in that case, you need to check the advance scanning option.
Advance Scan Option : This option is workable if your OST file is severely corrupt or auto scanning fails to recover OST file data.
Temp Folder Path : This option helps in minimizing the size of installation drive by moving the temp folder path to desired drive. (Temp folder is the folder where the software keep the scanned copy of OST file)
The following screen will appear while the file scanning goes on. You can see the details like: name of file being scanned, its overall size in KB & the file creation date.
In case you want to break the scanning process in between, click on Stop button.