{"id":8609,"date":"2025-01-24T12:24:09","date_gmt":"2025-01-24T12:24:09","guid":{"rendered":"https:\/\/www.adviksoft.com\/blog\/?p=8609"},"modified":"2026-01-13T03:36:38","modified_gmt":"2026-01-13T03:36:38","slug":"outlook-performance-issues-related-large-pst-size","status":"publish","type":"post","link":"https:\/\/www.adviksoft.com\/blog\/outlook-performance-issues-related-large-pst-size\/","title":{"rendered":"How to Fix Outlook Performance Issues With Large PST Size?"},"content":{"rendered":"<p><strong>Summary:<\/strong> When dealing with Outlook performance issues related to large PST size? Then here is the solution to fix this problem. Read the article till the end to know all the workable and efficient solutions.<\/p>\n<p>Microsoft Outlook is a popular desktop email client used by many businesses. However, over time, this application shows problems in sending, receiving, deleting, or running mailbox components. If you are facing such a problem, then it means you are dealing with oversized PST files.<\/p>\n<div class=\"red-border\">\n<div class=\"JlqpRe\"><span class=\"JCzEY ZwRhJd\"><span class=\"CSkcDe\">How do I reduce the size of my PST file? To deal with Outlook performance, you need to access manageable PST file. For instance, you can use the <strong>Advik <a href=\"https:\/\/www.adviksoft.com\/pst\/splitter.html\">PST Splitter Tool<\/a><\/strong> to reduce an unlimited number of PST file sizes with ease. This tool offers dual ways to upload multiple PST files into the software panel. Then, you can choose the different sizes to split large PST file accordingly. The best part about this tool is that it maintains the folder hierarchy and email elements of the PST file throughout the splitting process. Moreover, with its extensive features, you can easily manage large Outlook pst files.<br \/>\n<\/span><\/span><\/div>\n<div><a href=\"https:\/\/www.adviksoft.com\/dl\/advik-outlook-pst-converter.exe\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-21037\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2023\/10\/Download-Button-e1525685682329.png\" alt=\"\" width=\"213\" height=\"55\" \/><\/a><\/div>\n<\/div>\n<p>All Outlook mailbox data is stored in a PST file. When there is a large amount of data in the mailbox, it will definitely affect the performance of the Outlook application.<\/p>\n<p>Regarding PST file size, Outlook offers certain guidelines. Let&#8217;s see what they are.<\/p>\n<ul>\n<li>Up to 5GB, PST file is considered a small data file<\/li>\n<li>5 to 10 GB file is an optimal size PST file.<\/li>\n<li>25 GB PST file is a standard size in Outlook.<\/li>\n<li>50 GB is the maximum size of the PST file.<\/li>\n<\/ul>\n<h2>How to Dealing With Outlook Performance Issues Related Large PST Size<\/h2>\n<p>You can solve Outlook&#8217;s slow performance problem with a large PST file. To do this, follow the given other solution to boost Outlook performance.<\/p>\n<div class=\"red-border\">\n<h3>Reasons for slowing down Outlook Performance<\/h3>\n<ul>\n<li>Outlook runs slowly when the data file, e.g. B. PST is exceeded by the maximum size.<\/li>\n<li>When <a href=\"https:\/\/www.adviksoft.com\/blog\/outlook-data-file-too-large-to-open\/\">Outlook Data File Too Large to Open<\/a><\/li>\n<li>Corrupted and damaged PST files can also affect Outlook performance.<\/li>\n<\/ul>\n<\/div>\n<p>To fix this kind of problem, let&#8217;s learn different methods that help in large-size file PST issue<\/p>\n<div class=\"blue-border\">\n<h3>#1. Delete Mailbox Folder that is not Important<\/h3>\n<p>When your Outlook performance becomes slow then the first step should be to delete unwanted components or messages from the mailbox. Follow the simple steps to do that,<\/p>\n<ol>\n<li>Open Outlook email client.<\/li>\n<li>Select the folder that is not required.<\/li>\n<li>Click on the <strong>Clean Up<\/strong> option present on the Home menu. After that select any of the three options that are shown in the below screenshot.\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-8629\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/clean-up-ribbon.png\" alt=\"Dealing With Outlook Performance &lt;ul&gt; Issues Related Large PST Size\" width=\"528\" height=\"266\" \/><br \/>\n<strong>Clean Up-Conversion:<\/strong> It will delete duplicate or non-important email messages from the selected folder.<br \/>\n<strong>Delete Folder:<\/strong> This option will delete the message from a certain folder.<br \/>\n<strong>Folder and Subfolders:<\/strong> Using this you can remove the folder that is not required.<\/li>\n<li>At last, right-click on the <strong>Delete Item folder<\/strong> and select the <strong>Empty Folder<\/strong> option to permanently delete a similar message from the mailbox.\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-8614 \" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/img_54fb8adce4329.png\" alt=\"Dealing With Outlook Performance Issues Related Large PST Size\" width=\"306\" height=\"314\" \/><\/li>\n<\/ol>\n<\/div>\n<p><strong>How to &#8211; <a href=\"https:\/\/www.adviksoft.com\/blog\/increase-outlook-mailbox-size-windows-11\/\">Increase Outlook Mailbox Size in Windows 11<\/a><\/strong><\/p>\n<div class=\"black-border\">\n<h3>#2. Compact and Compose PST File<\/h3>\n<p>In Outlook 2013 and above versions, there is an option<strong> &#8220;Compact Now&#8221;<\/strong> that helps in deleting data space. This helps in reducing the size of the Outlook data file (.pst). Using this feature you can manually compress the PST file by simply following the given instructions;<\/p>\n<ol>\n<li>Open Outlook and navigate your cursor to the menu bar.<\/li>\n<li>Here click on <strong>File &gt;&gt; Account Setting<\/strong>. <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-8613\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/2-2.png\" alt=\"solve large Outlook file size issue\" width=\"641\" height=\"480\" srcset=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/2-2.png 797w, https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/2-2-768x575.png 768w\" sizes=\"auto, (max-width: 641px) 100vw, 641px\" \/><\/li>\n<li>After that a window will open, click on the <strong>Data File<\/strong> tab and then on the .pst file that needs to be compressed.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-8616\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/3-2-1.png\" alt=\"Dealing With Outlook Performance Issues Related Large PST Size\" width=\"615\" height=\"503\" \/><\/li>\n<li>Next click on Setting, then in<strong> Outlook Data File box<\/strong>, click on <strong>Compact Now<\/strong>.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-8618\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/4-2.png\" alt=\"solve Outlook performance issue related to large pst file\" width=\"430\" height=\"430\" \/><\/li>\n<li>At last click on the Ok button to start the process.\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-8612\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/5-1-2.png\" alt=\"Dealing With Outlook Performance Issues Related Large PST Size\" width=\"444\" height=\"152\" \/><\/li>\n<\/ol>\n<\/div>\n<h4>Limitations with the manual method<\/h4>\n<p>There are certain limitations with these manual methods mentioned above, some of them are;<\/p>\n<ul>\n<li>This solution was a waste of time because to use this tool you have to go through entire components of Outlook manually.<\/li>\n<li>There is no security of your data with this method. You may lose important data while performing these operations to improve Outlook performance.<\/li>\n<li>There is a high possibility of data loss when using the Compact function. There is also the possibility of data transfer.<\/li>\n<\/ul>\n<h2>How to Fix Outlook Performance With Large PST Size?<\/h2>\n<p>As we have mentioned earlier, this large PST file is a major reason for slow Outlook performance. Therefore, the first step to increase speed is to <a href=\"https:\/\/www.adviksoft.com\/blog\/reduce-pst-file-size-without-outlook\/\">reduce PST file size<\/a>. To do this, you simply need to split the large .pst file into small chunk files because <a href=\"https:\/\/www.adviksoft.com\/blog\/how-to-fix-large-pst-file-crashes-outlook-while-opening-issue\/\">large PST file crashes Outlook while opening<\/a>. However, there is no direct manual method to split large Outlook data files, hence users are advised to opt for an automated tool.<\/p>\n<p>One such software is <strong>Advik <a href=\"https:\/\/www.adviksoft.com\/pst\/splitter.html\">PST Splitter Tool<\/a><\/strong> which can easily create small .pst files from large PST files without data loss. Also, this tool ensures that data integrity is maintained while this process is in progress so that we can preserve your original data.<\/p>\n<p><a href=\"https:\/\/www.adviksoft.com\/dl\/advik-outlook-pst-converter.exe\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-181\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2018\/05\/Download-Button-e1525685682329.png\" alt=\"\" width=\"213\" height=\"55\" \/><\/a>\u00a0 \u00a0 <a href=\"https:\/\/www.adviksoft.com\/buy\/pst\/converter.html\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-620\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2018\/05\/buy-now-button.png\" alt=\"\" width=\"190\" height=\"75\" \/><\/a><\/p>\n<p><strong>Follow the below Steps to Split a Large PST File into Small Segments<\/strong><\/p>\n<ol>\n<li>Install and launch Advik PST Splitter software on your Windows OS<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-8622 \" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/outlook-pst-converter-11.png\" alt=\"Dealing With Outlook Performance Issues Related Large PST Size\" width=\"633\" height=\"534\" \/><\/li>\n<li>Select the mailbox folder and click on the Next button.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-8619\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/outlook-pst-converter-12.png\" alt=\"how to solve Outlook performance related to large pst file\" width=\"632\" height=\"533\" \/><\/li>\n<li>Choose <strong>PST<\/strong> as a saving option. Along with that tick the check box <strong>&#8220;Separate PST per user&#8221;<\/strong> and <strong>&#8220;Split PST&#8221;<\/strong> and choose the size.\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-8620\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/outlook-pst-converter-13.png\" alt=\"Dealing With Outlook Performance Issues Related Large PST Size\" width=\"641\" height=\"541\" \/><\/li>\n<li>At last, browse the<strong> destination location<\/strong> and click on the <strong>Next<\/strong> button to start the process.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-8621\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/01\/outlook-pst-converter-14.png\" alt=\"Dealing With Outlook Performance Issues Related Large PST Size\" width=\"641\" height=\"541\" \/><\/li>\n<\/ol>\n<p>Here you split the large PST file into small-size files. Now you can import these files into an Outlook account through the Import\/Export tool and delete the single large data file.<\/p>\n<p><a href=\"https:\/\/www.adviksoft.com\/dl\/advik-outlook-pst-converter.exe\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-181\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2018\/05\/Download-Button-e1525685682329.png\" alt=\"\" width=\"213\" height=\"55\" \/><\/a><\/p>\n<h4>Conclusion<\/h4>\n<p>Here in this article, we are discussing different methods to dealing With Outlook performance issues related large PST size. We offer both manual and automated solutions. Users can opt for any of these methods to deal with large PST files. Well, the proposed software is designed to split the large Outlook PST file into small segments without data loss and modification.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Summary: When dealing with Outlook performance issues related to large PST size? Then here is the solution to fix this problem. Read the article till the end to know all the workable and efficient solutions. Microsoft Outlook is a popular desktop email client used by many businesses. However, over time, this application shows problems in [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":8631,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-8609","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-outlook"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fix Outlook Performance Issues With Large PST Size<\/title>\n<meta name=\"description\" content=\"Are you Dealing With Outlook Performance Issues Related Large PST Size? 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