
Being oversized means the PST file has reached or exceeded its maximum size limitation. An oversized PST file is always prone to corruption. Sometimes you can face even the worst situation which is corruption. You’ll notice that the Outlook client starts hanging or crashing frequently. If the size of the PST file grows and reaches its maximum size, it may cause some serious problems for Outlook users. Though it provides you with enough storage space, sometimes you may face size limitation issues. It means most of the Outlook users are using Unicode PST file format. These days, most Outlook users are using the latest versions. Now it’s clear that Unicode PST file provides you more storage space than ANSI PST. And in Outlook 2013 & 2016, the maximum size limitation is 50 GB. In Outlook 2003, 2007 & 2010, the maximum size limitation is 20 GB. On the other hand, a Unicode PST file can store 20 to 50 GB mailbox content. An ANSI PST file can only store up to 2 GB of mailbox content. Size limitation is the only difference between these two formats. In Outlook 2003 and later versions including the latest 2016, PST files are saved in Unicode format. In Outlook 2002 and earlier versions, PST files are saved in ANSI format. It saves the PST files in two different formats: ANSI and Unicode. Microsoft Outlook client creates Outlook data file, called PST or personal storage table, on a local computer system.
