{"id":543,"date":"2017-10-27T11:07:36","date_gmt":"2017-10-27T11:07:36","guid":{"rendered":"http:\/\/arysontechnologies.com\/blog\/?p=543"},"modified":"2026-09-07T11:36:41","modified_gmt":"2026-09-07T11:36:41","slug":"split-large-outlook-pst-file","status":"publish","type":"post","link":"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/","title":{"rendered":"How to Split Large PST Files for All Outlook Versions"},"content":{"rendered":"<div class=\"block_sum mb-3\"><em>When Outlook PST files grow beyond safe size limits, users often experience slow loading, unexpected errors, or even data corruption. This issue can affect all Outlook versions, from older editions to the latest ones. To avoid such problems, splitting large PST files becomes essential. <a title=\"PST Splitter\" href=\"https:\/\/www.arysontechnologies.com\/split-pst-file.html\" target=\"_blank\" rel=\"noopener\"><strong>Aryson Outlook PST Splitter Tool<\/strong><\/a> helps users divide oversized PST files into smaller files without altering emails, folders, or attachments. In this blog, you will discover how to split large PST files for all Outlook versions using a secure and easy approach.<\/em><\/p>\n<div class=\"row justify-content-center mac-win-tab\">\n<div class=\"col-md-6\">\n<ul id=\"myTab\" class=\"nav nav-tabs justify-content-center border-primary\" role=\"tablist\">\n<li class=\"nav-item\" role=\"presentation\"><button id=\"home-tab\" class=\"nav-link bg-transparent px-4 active\" role=\"tab\" type=\"button\" data-toggle=\"tab\" data-target=\"#home\" aria-controls=\"home\" aria-selected=\"true\"><i class=\"icon-windows\"><\/i> Windows<\/button><\/li>\n<li class=\"nav-item\" role=\"presentation\"><button id=\"profile-tab\" class=\"nav-link bg-transparent px-4\" role=\"tab\" type=\"button\" data-toggle=\"tab\" data-target=\"#profile\" aria-controls=\"profile\" aria-selected=\"false\"><i class=\"icon-apple\"><\/i>Mac<\/button><\/li>\n<\/ul>\n<div id=\"myTabContent\" class=\"tab-content\">\n<div id=\"home\" class=\"tab-pane fade active show\" 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Now<\/a><\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/#What_Is_a_PST_File_and_Its_Size_Limits\" >What Is a PST File and Its Size Limits<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/#Understanding_the_Need_to_Split_Large_PST_Files\" >Understanding the Need to Split Large PST Files<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/#How_Many_Ways_Are_There_to_Split_PST_Files\" >How Many Ways Are There to Split PST Files<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/#Method_01_Split_Large_PST_File_Manually_Using_Outlook\" >Method 01: Split Large PST File Manually Using Outlook<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/#Limitations_of_the_Manual_PST_Splitting_Method\" >Limitations of the Manual PST Splitting Method<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/#Method_02_Use_the_Automated_PST_Splitter_to_Split_Large_PST_Files\" >Method 02: Use the Automated PST Splitter to Split Large PST Files<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/#Follow_these_Steps_to_Split_Large_PST_file_in_Bulk\" >Follow these Steps to Split Large PST file in Bulk<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/#Conclusion\" >Conclusion<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/#FAQs_About_Splitting_Large_PST_Files\" >FAQs About Splitting Large PST Files<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"What_Is_a_PST_File_and_Its_Size_Limits\"><\/span>What Is a PST File and Its Size Limits<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A PST (Personal Storage Table) file stores Outlook mailbox data locally. However, Outlook applies size limits.<\/p>\n<ul>\n<li>Outlook 2002 and earlier: 2 GB limit<\/li>\n<li>Outlook 2007, 2010, 2013, 2016, 2019, 2021: 50 GB limit<\/li>\n<li>Microsoft 365 Outlook: 50 GB recommended limit<\/li>\n<\/ul>\n<p>Once the PST file crosses safe limits, Outlook may stop responding. Therefore, splitting the file early is always a smart move.<\/p>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Understanding_the_Need_to_Split_Large_PST_Files\"><\/span>Understanding the Need to Split Large PST Files<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When you manage large PST files, it becomes crucial to keep Outlook running smoothly and prevent data loss. Here are the main reasons why splitting PST files is necessary:<\/p>\n<ul>\n<li>Large PST files slow down Outlook performance.<\/li>\n<li>Searching emails and switching folders becomes slower.<\/li>\n<li>Oversized PST files increase the risk of corruption.<\/li>\n<li>Corrupted PST files can make emails and attachments inaccessible.<\/li>\n<li>Backing up or restoring large PST files takes more time.<\/li>\n<li>Migrating huge PST files to another system is difficult.<\/li>\n<li>Large PST files can cause Outlook crashes or freezes.<\/li>\n<li>Splitting PST files improves performance and protects your data.<\/li>\n<\/ul>\n<p>By understanding these challenges, it becomes clear that why you need to compact PST file Outlook. It is essential for efficient and safe email management.<\/p>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"How_Many_Ways_Are_There_to_Split_PST_Files\"><\/span>How Many Ways Are There to Split PST Files<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>There are two main ways to split large PST files:<\/p>\n<ol>\n<li>Manual method using Microsoft Outlook<\/li>\n<li>Automatic method using a professional PST splitting tool<\/li>\n<\/ol>\n<p>Both methods work differently. So, choosing the right one depends on mailbox size, technical skills, and time availability.<\/p>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Method_01_Split_Large_PST_File_Manually_Using_Outlook\"><\/span>Method 01: Split Large PST File Manually Using Outlook<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Outlook does not offer a direct &ldquo;split PST&rdquo; option to break Outlook PST file. However, users can manually reduce PST size by creating new PST files and moving data. Follow the given steps to divide PST file into smaller parts:<\/p>\n<ol>\n<li>Launch Outlook on your computer to begin the process.<\/li>\n<li>Then, click on <strong>File &gt; Account Settings &gt; Account Settings<\/strong> to access the PST File.<\/li>\n<li>In the Account Settings window, select the <strong>Data Files<\/strong> tab to view all PST files.<\/li>\n<li>Now, click on <strong>Add<\/strong> to create a new PST file. Choose a location on your computer.<\/li>\n<li>After that, select the large PST file and drag it into the new PST file.<\/li>\n<li>Also, you can use the <strong>Move to Folder<\/strong> option for better organization.<\/li>\n<li>Repeat this process as necessary until the original PST file size is reduced.<\/li>\n<\/ol>\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Limitations_of_the_Manual_PST_Splitting_Method\"><\/span>Limitations of the Manual PST Splitting Method<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>However, the manual method is free; it has several drawbacks that users must consider:<\/p>\n<ul>\n<li>Moving emails manually, especially for large mailboxes, can take hours or even days.<\/li>\n<li>Drag-and-drop operations may result in misplaced emails or missed folders.<\/li>\n<li>Moreover, large PST files may cause Outlook to freeze or become unresponsive.<\/li>\n<li>Along with that, some email attachments may not transfer properly.<\/li>\n<li>Mistakes during manual splitting may lead to permanent loss of emails.<\/li>\n<\/ul>\n<p>When PST files contain thousands of emails, the manual method becomes unreliable. Outlook may freeze during data movement. Hence, professionals and business users prefer automated solutions to avoid these risks.<\/p>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Method_02_Use_the_Automated_PST_Splitter_to_Split_Large_PST_Files\"><\/span>Method 02: Use the Automated PST Splitter to Split Large PST Files<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Aryson PST Splitter<\/strong> is the expert-recommended solution to Split PST file Outlook 2026 \/ 2021 \/ 2019 \/ 2016 \/ 2013 \/ 2010, along with all earlier and major versions. It can handle large PST files without compromising data integrity. Moreover, it supports both ANSI and Unicode PST files, compatible with PSTs created in any Outlook edition. Other notable features include a <strong>user-friendly interface<\/strong>, <strong>fast processing<\/strong>, and <strong>zero risk of data loss<\/strong>. Along with that, it provides different filters to <a title=\"Split oversized PST File\" href=\"https:\/\/www.arysontechnologies.com\/blog\/how-to-split-outlook-pst-file\/\" target=\"_blank\" rel=\"noopener\"><strong>manage oversized PST files<\/strong><\/a>:<\/p>\n<ul>\n<li><strong>Split PST by Size:<\/strong> Divide large PST files into smaller files based on specific size limits to prevent Outlook crashes.<\/li>\n<li><strong>Split PST by Date Range:<\/strong> Create separate PST files for emails received within a particular date range.<\/li>\n<li><strong>Split PST by Folder:<\/strong> Maintain the original folder hierarchy while splitting files.<\/li>\n<li><strong>Split PST by Sender or Subject:<\/strong> Extract emails from specific senders or based on subject lines.<\/li>\n<\/ul>\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Follow_these_Steps_to_Split_Large_PST_file_in_Bulk\"><\/span>Follow these Steps to Split Large PST file in Bulk<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Install the Aryson PST File Splitter on your Windows system and launch it.<\/li>\n<li>Use the <strong>Add File<\/strong> or <strong>Add Folder<\/strong> option to load the PST file you want to split.<\/li>\n<li>Select a splitting method such as by size, date, year, folder, or sender.<\/li>\n<li>Now, you can select a destination folder to save the new PST files.<\/li>\n<li>Apply filters or include\/exclude particular folders to customize the split.<\/li>\n<li>Click <strong>Split<\/strong> to reduce PST file size into smaller, manageable files.<\/li>\n<\/ul>\n<p>Within minutes, your large PST file will be split into several smaller files, making Outlook more responsive and easier to manage.<\/p>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Large PST files affect Outlook performance and increase corruption risks. Manual ways to split large PST file may help in limited cases, but they involve effort and uncertainty. In contrast, automated split software provides a structured and reliable splitting approach that keeps mailbox data safe and Outlook responsive. With the right method, users can manage PST files efficiently across all Outlook versions and avoid future issues.<\/p>\n<h3 class=\"faq-main_heading\"><span class=\"ez-toc-section\" id=\"FAQs_About_Splitting_Large_PST_Files\"><\/span>FAQs About Splitting Large PST Files<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1769603652304\"><strong class=\"schema-faq-question\"><strong>Q1. Can I split PST files manually without any software?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Yes, Outlook allows you to create new PST files and move emails manually. However, this method is time-consuming, error-prone, and not recommended for large mailboxes.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1769603680507\"><strong class=\"schema-faq-question\"><strong>Q2. Which Outlook versions are compatible with Aryson PST Splitter?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Aryson PST Splitter works with all major Outlook versions, including Outlook 2021, 2019, 2016, 2013, 2010, 2007, and Microsoft 365 Outlook.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1769603698196\"><strong class=\"schema-faq-question\"><strong>Q4. Will splitting a PST file using Aryson PST Splitter affect my emails or attachments?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> No. Aryson PST Splitter preserves all emails, attachments, metadata, and folder structures while splitting the PST file.<\/p> <\/div> <\/div>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;543&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;2&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;5\\\/5 - (2 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;How to Split Large PST Files for All Outlook Versions&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (2 votes)    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>When Outlook PST files grow beyond safe size limits, users often experience slow loading, unexpected errors, or even data corruption.<a class=\"read-more ml-1 main-read-more\" href=\"https:\/\/www.arysontechnologies.com\/blog\/split-large-outlook-pst-file\/\">Read More<\/a><\/p>\n","protected":false},"author":12,"featured_media":5763,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[139],"tags":[],"class_list":["post-543","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-outlook"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Split Large PST Files for All Outlook Versions<\/title>\n<meta name=\"description\" content=\"Explore methods to split large PST files for all Outlook versions. 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