Microsoft has many applications through which user can perform different tasks within a system. MS Outlook is an application of Microsoft which is used to store and share the data items from source to destination. MS outlook stores data in different file formats such as .pst, .ost, etc. Outlook PST file consists two main file formats i.e ANSI and UNICODE, where 2 GB size limit for ANSI PST file format and 20 GB for UNICODE file format (50 GB in case of MS Outlook 2010). Sometimes large or exceeding size of PST files may the huge reason of data loss. Hence, to make data error free and protect it from any type of data corruption or data loss, split the PST file into small size PST files. In this blog, I am focusing on the manual process to split PST file.