My Microsoft Outlook has become very slow, and it often freezes while opening emails or searching for data. I noticed that my PST file size is quite large, which might be affecting Outlook’s performance. I want to reduce the PST file size without losing important emails, contacts, or attachments. What are the safest and most effective methods to decrease PST file size for better Outlook performance? Please suggest both manual techniques and reliable solutions that work on all recent Windows and Outlook versions.