How Oversized PST Files Impact Outlook Performance and How to Fix It?

THOMPSON01

Member
May 10, 2025
43
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6
I have been using MS Outlook for a long time, and my PST file has grown quite large. Recently, I noticed Outlook has become very slow — it takes a long time to open, search emails, and sometimes even freezes. I suspect the oversized PST file might be the reason for these performance issues. Can anyone explain how large PST files affect Outlook performance? Also, what are the best methods or tools to reduce or manage PST file size without losing data?
 

loganellis

New member
May 22, 2025
11
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1
Microsoft Outlook is a popular email client that stores your emails, contacts, calendars, and other data in PST (Personal Storage Table) files. When the PST file becomes too large, it can affect Outlook's performance. So DataVare Outlook PST Compact Expert Tool is a great solution. This tool safely compacts your Oversized PST file without losing data and improves performance. Its user interface is simple and can be used easily, even without any technical knowledge. I have used it, and my Outlook speed has become better than ever. If you want to improve Outlook, then definitely try this tool.