Outlook by default stores all its mailbox data into a single file that is “PST” file. It stands for Personal Storage Table. It is obvious that when the Outlook stores data in PST file the size of the PST will get bigger. User finds it difficult to deal with bigger PST File.
Outlook has set particular size of PST for different version, From Outlook 98 to 2002 the size limitation is 2 GB and from 2003 to 2016 it’s 20GB. Once you reach the PST file size limit, the performance of the Outlook slows down as a result Outlook hangs or freezes during launching. Or sometimes it gets corrupted. Below are some issues that found due to increased size of PST: