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+--- Thread: 10GB+ PST leading to Outlook performance problems: Need Help (/showthread.php?tid=44054)
10GB+ PST leading to Outlook performance problems: Need Help - Thomaswilson081 - 11-18-2025
I am currently facing serious performance issues in Outlook because my PST file has grown over 10GB. Outlook is frequently freezing, taking too long to open emails, and sometimes even stops responding completely. What is the safest and most effective way to fix performance issues caused by an oversized PST file? Are there any recommended tools or methods to reduce the file size without risking data loss?
RE: 10GB+ PST leading to Outlook performance problems: Need Help - sarahharris - 11-18-2025
It's common to have problems like slow performance, freezes, delays in viewing emails, and search errors if your Outlook PST file is larger than 10GB. A large PST file directly impacts Outlook's speed, especially for users with older systems or large mailboxes. I recently tried Softaken Compress PST Software, and it really proved to be a great tool for safely shrinking a large PST file. The software's specialty is that it reduces the file size by removing large attachments from the PST file or saving them to a separate folder, without any data loss. The interface is quite simple and even non-technical users can easily use it. If you’re 5GB, 10GB, or larger PST file is taking a long time to load in Outlook, Compress PST Software is a good and reliable option. I recommend it as a worthwhile option.