{"id":4749,"date":"2025-05-15T07:04:24","date_gmt":"2025-05-15T07:04:24","guid":{"rendered":"https:\/\/www.arysontechnologies.com\/blog\/?p=4749"},"modified":"2026-02-09T13:17:17","modified_gmt":"2026-02-09T13:17:17","slug":"ost-file-becomes-too-large","status":"publish","type":"post","link":"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/","title":{"rendered":"What happens if my OST file becomes too large? Expert Guides"},"content":{"rendered":"<div class=\"block_sum mb-3\"><em><strong>Summary:- <\/strong>Generally, the OST file stores an offline copy of your important emails, contacts, and attachments. Over time, as more messages and files are added, the OST file can grow significantly in size. If it is not managed properly, it can lead to serious problems for Outlook users. This can cause a slowdown in Outlook performance or a crash. To avoid these problems, you can use an <a href=\"https:\/\/www.arysontechnologies.com\/ost-splitter\/\"><strong>OST Splitter Tool<\/strong><\/a> to manage and reduce the size of large OST files. In this blog, we\u2019ll explain what happens when the OST file is too large and share simple methods to fix it.<\/em>\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\" role=\"tabpanel\" aria-labelledby=\"home-tab\"><span class=\"block_btn\"><a class=\"custom-download-btn\" href=\"https:\/\/www.arysontechnologies.com\/demo-version\/Aryson-OST-Splitter.exe\"><i class=\"icon-windows\"><\/i> Download Now<\/a>\u00a0\u00a0<a class=\"custom-buy-btn\" href=\"https:\/\/www.arysontechnologies.com\/ost-splitter\/buy-now.php\"><i class=\"icon-basket\"><\/i> Purchase Now<\/a><\/span><\/div>\n<div id=\"profile\" class=\"tab-pane fade\" role=\"tabpanel\" aria-labelledby=\"profile-tab\"><span class=\"block_btn\"><a class=\"custom-download-btn\" href=\"https:\/\/www.arysontechnologies.com\/demo-version\/Aryson-OST-Splitter-mac.dmg\"><i class=\"icon-apple\"><\/i> Download Now<\/a>\u00a0\u00a0<a class=\"custom-buy-btn\" href=\"https:\/\/www.arysontechnologies.com\/mac\/ost-splitter\/buy-now.php\"><i class=\"icon-basket\"><\/i> Purchase 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\/ost-file-becomes-too-large\/#Why_Your_OST_File_Becomes_Too_Large_in_Outlook\" >Why Your OST File Becomes Too Large in Outlook?<\/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\/ost-file-becomes-too-large\/#What_Happens_If_My_OST_File_Is_Too_Big\" >What Happens If My OST File Is Too Big?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#What_is_the_Maximum_OST_File_Size\" >What is the Maximum OST File Size?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#How_to_Fix_Outlook_OST_File_Too_Large_Issue_Manually\" >How to Fix Outlook OST File Too Large Issue Manually?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#Method_01_Remove_Unnecessary_Add-ins_From_Outlook\" >Method 01: Remove Unnecessary Add-ins From Outlook<\/a><\/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\/ost-file-becomes-too-large\/#Method_02_Compact_the_Large_OST_File_With_Outlook_Built-in_Feature\" >Method 02: Compact the Large OST File With Outlook Built-in Feature<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#Method_03_Use_Archive_Option_to_Fix_Outlook_OST_File_Too_Big\" >Method 03: Use Archive Option to Fix Outlook OST File Too Big<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#Method_04_Turn_Off_Shared_Folder_Sync_in_Outlook\" >Method 04: Turn Off Shared Folder Sync in Outlook<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#Drawbacks_of_Using_the_Manual_Method\" >Drawbacks of Using the Manual Method<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#Best_Tool_to_Repair_and_Manage_an_OST_File_Too_Large\" >Best Tool to Repair and Manage an OST File Too Large<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#Steps_to_Split_an_Oversized_OST_File_With_an_Advanced_Utility\" >Steps to Split an Oversized OST File With an Advanced Utility:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#Benefits_of_Using_the_OST_Splitter_Tool\" >Benefits of Using the OST Splitter Tool:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#Conclusion\" >Conclusion<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#Frequently_Asked_Questions\" >Frequently Asked Questions:-<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Why_Your_OST_File_Becomes_Too_Large_in_Outlook\"><\/span>Why Your OST File Becomes Too Large in Outlook?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>There are several reasons why your OST file increases the file size, including:<\/p>\n<ul>\n<li>When you send or receive a lot of emails daily.<\/li>\n<li>Large attachments are stored in your mailbox.<\/li>\n<li>You are not deleting your old emails and the deleted items folder.<\/li>\n<li>Your Outlook is set to sync too much offline mail.<\/li>\n<\/ul>\n<p>All of these reasons can increase your OST file size.<\/p>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"What_Happens_If_My_OST_File_Is_Too_Big\"><\/span>What Happens If My OST File Is Too Big?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Once your OST file becomes oversized, you will face multiple problems, such as:<\/p>\n<ul>\n<li>You cannot open and load your OST file.<\/li>\n<li>Not applicable to add data into the existing OST file.<\/li>\n<li>Multiple functions can stop working in MS Outlook.<\/li>\n<li>A large file can easily be prone to corruption.<\/li>\n<\/ul>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"What_is_the_Maximum_OST_File_Size\"><\/span>What is the Maximum OST File Size?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The size of the OST file depends on the version of MS Outlook that you are using.<\/p>\n<ul>\n<li>Outlook 2007 \u2013 Up to 20 GB<\/li>\n<li>Outlook 2010 and later \u2013 Up to 50 GB<\/li>\n<\/ul>\n<p>If the size reaches the limits, it&#8217;s need to take action and manage your file.<\/p>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"How_to_Fix_Outlook_OST_File_Too_Large_Issue_Manually\"><\/span>How to Fix Outlook OST File Too Large Issue Manually?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>There are multiple manual methods available to fix the oversized OST file. So that you can prevent your data from being inaccessible or prone to corruption. You can apply these basic methods to <a href=\"https:\/\/www.arysontechnologies.com\/how-to\/reduce-ost-file-size-in-outlook\/\"><strong>reduce the size of a large OST file in Outlook<\/strong><\/a>, like:<\/p>\n<ul>\n<li>Remove unnecessary emails from your OST File.<\/li>\n<li>Download important and oversized attachments on your device.<\/li>\n<li>Permanently clean the deleted items folder.<\/li>\n<li>Rewrite the name of your OST file and create it again.<\/li>\n<\/ul>\n<p>Let&#8217;s explore all the methods in detail.<\/p>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Method_01_Remove_Unnecessary_Add-ins_From_Outlook\"><\/span>Method 01: Remove Unnecessary Add-ins From Outlook<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When your OST file is too large, you need to decrease its size. Here is how you can perform it to decrease the size of the OST file:<\/p>\n<ol>\n<li>Once <strong>Outlook<\/strong> is open, click on the File menu, and then click on <strong>Options<\/strong>.<\/li>\n<li>Now, choose the <strong>Add-ins<\/strong> options from the list and select <strong>Manage<\/strong>.<\/li>\n<li>After that, choose the <strong>COM Add-Ins<\/strong> from the given list and hit <strong>Go<\/strong>.<\/li>\n<li>Unmark all the <strong>Add-ins<\/strong> that are not in use and press <strong>OK<\/strong>.<\/li>\n<\/ol>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Method_02_Compact_the_Large_OST_File_With_Outlook_Built-in_Feature\"><\/span>Method 02: Compact the Large OST File With Outlook Built-in Feature<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can decrease the size by removing all the unnecessary information from your OST file. Continue with the steps below:<\/p>\n<ol>\n<li>Firstly, go to the <strong>Home Page<\/strong> in Outlook and choose the <strong>Deleted Items folder.<\/strong><\/li>\n<li>Right-click on it and select <strong>Empty Folder<\/strong> from the list.<\/li>\n<li>Then, <strong>compact<\/strong> it by using these steps:<\/li>\n<li>Click on the <strong>Data file<\/strong> option from the given tabs and choose<strong> Settings<\/strong>.<\/li>\n<li>Further, select the <strong>Advanced<\/strong> tab and then go to <strong>Outlook Data File Settings<\/strong>.<\/li>\n<li>In the last step, choose the <strong>Compact Now <\/strong>option to decrease the size of the OST file.<\/li>\n<\/ol>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Method_03_Use_Archive_Option_to_Fix_Outlook_OST_File_Too_Big\"><\/span>Method 03: Use Archive Option to Fix Outlook OST File Too Big<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sometimes, archiving old emails can reduce the size of the OST file. Changing the location of the archive in your system might be beneficial to reduce OST size.<\/p>\n<ol>\n<li>Firstly, click on the <strong>File<\/strong> tab and choose <strong>Tools<\/strong>, then <strong>Cleanup Mailbox<\/strong>.<\/li>\n<li>Now, you can transfer your data to the archive folder by selecting the <strong>Auto Archive <\/strong>option.<\/li>\n<li>In the last step, click <strong>Empty<\/strong> and click <strong>Close<\/strong>.<\/li>\n<\/ol>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Method_04_Turn_Off_Shared_Folder_Sync_in_Outlook\"><\/span>Method 04: Turn Off Shared Folder Sync in Outlook<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Shared folders in Outlook can quickly add to the size of your OST file, which leads to Outlook performance issues. To improve Outlook&#8217;s speed, you can turn off the sync feature for shared folders by following these simple steps:<\/p>\n<ol>\n<li>Open <strong>Outlook<\/strong> and click on the <strong>File<\/strong> tab.<\/li>\n<li>Go to <strong>Account Settings<\/strong>, then select <strong>Account Settings<\/strong> again from the dropdown.<\/li>\n<li>Under the <strong>Data Files<\/strong> tab, pick the <strong>OST file<\/strong> you&#8217;re using.<\/li>\n<li>Click <strong>Settings<\/strong>, then move to the <strong>Advanced<\/strong> tab.<\/li>\n<li>Afterward, choose <strong>Outlook Data File Settings<\/strong> and uncheck the option that says <strong>Download Shared Folders<\/strong>.<\/li>\n<li>Finally, click <strong>OK<\/strong>. Close and restart Outlook to apply the new settings.<\/li>\n<\/ol>\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Drawbacks_of_Using_the_Manual_Method\"><\/span>Drawbacks of Using the Manual Method<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>While manual methods can sometimes fix minor issues with Outlook OST files, they come with several limitations. Here are the key drawbacks you should be aware of:<\/p>\n<ul>\n<li>Manual solutions often require multiple steps, which can take a lot of time.<\/li>\n<li>If the OST file is severely corrupted or too large, manual fixes may fail.<\/li>\n<li>There&#8217;s always a chance you could lose important emails or data during manual troubleshooting.<\/li>\n<li>If you&#8217;re not confident using advanced Outlook settings, the manual method can be a hassle.<\/li>\n<li>Moreover, manual options don\u2019t have the tools needed to fix deep-level or structural issues in the OST file.<\/li>\n<\/ul>\n<p>To recover from these limitations, you can use the professional tool and get a hassle-free solution.<\/p>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Best_Tool_to_Repair_and_Manage_an_OST_File_Too_Large\"><\/span>Best Tool to Repair and Manage an OST File Too Large<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The <strong>Aryson OST Splitter Tool<\/strong> is helpful to decrease the size of the OST file. It splits your oversized OST files into smaller parts based on Size, Date, Sender, and Folder. With this top-notch utility, you can split a single or multiple OST files simultaneously without any hassle. You can access all your important emails, contacts, events, and other data without relying on MS Outlook. Additionally, it offers a simple interface, which is easy to understand and operate even for non-tech users.<\/p>\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Steps_to_Split_an_Oversized_OST_File_With_an_Advanced_Utility\"><\/span>Steps to Split an Oversized OST File With an Advanced Utility:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li>Firstly, install the <strong>OST Splitter Tool<\/strong> on your system.<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4751\" src=\"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/1-2.jpg\" alt=\"Run Aryson OST Splitter Tool\" width=\"630\" height=\"490\" srcset=\"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/1-2.jpg 630w, https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/1-2-300x233.jpg 300w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/li>\n<li>Click on <strong>Add File<\/strong> or <strong>Add Folder,<\/strong> and select the oversized OST. Press <strong>Next<\/strong>.<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4752\" src=\"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/2-2.jpg\" alt=\"select the oversized OST\" width=\"630\" height=\"490\" srcset=\"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/2-2.jpg 630w, https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/2-2-300x233.jpg 300w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/li>\n<li>After that, <strong>cross-verify<\/strong> &amp; <strong>select <\/strong>the added OST file.<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4753\" src=\"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/3-2.jpg\" alt=\"select the added OST file\" width=\"630\" height=\"490\" srcset=\"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/3-2.jpg 630w, https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/3-2-300x233.jpg 300w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/li>\n<li>Choose the <strong>Split <\/strong>options according to your requirements.<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4754\" src=\"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/4-2.jpg\" alt=\"Choose the Split\" width=\"630\" height=\"490\" srcset=\"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/4-2.jpg 630w, https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/4-2-300x233.jpg 300w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/li>\n<li>Lastly, apply features and filters. Click <strong>Split <\/strong>to initiate the splitting process.<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4755\" src=\"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/5-2.jpg\" alt=\"Click Split\" width=\"630\" height=\"490\" srcset=\"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/5-2.jpg 630w, https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2025\/05\/5-2-300x233.jpg 300w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/li>\n<\/ol>\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Benefits_of_Using_the_OST_Splitter_Tool\"><\/span>Benefits of Using the OST Splitter Tool:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>If your OST file becomes too large, the best solution is to split the OST file into several smaller parts. This process can be done by using an effective and efficient OST Splitter Tool. It offers several developed features or filters, like:<\/p>\n<ul>\n<li>With the Remove duplicate option, you can exclude duplicate emails.<\/li>\n<li>Ability to see the content of the OST file before splitting it.<\/li>\n<li>Provides a feature to protect the OST file by applying a Password to it.<\/li>\n<li>Fully compatible with all Windows OS versions, including Windows 11, 10, 9, and more.<\/li>\n<\/ul>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Above, we shared different methods to reduce the size of the OST file. It protects your Outlook from slowing down when the OST file too large. You can use either the manual method or a splitter tool to decrease the OST size. However, we recommend using the professional tool as a good choice. It saves your time, efforts, and offers a hassle-free result without data loss. Moreover, the trial (demo) version of this software is public to estimate its performance and familiarity.<\/p>\n<h4 class=\"faq-main_heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions:-<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1747292450248\"><strong class=\"schema-faq-question\"><strong>Q1. How can I check the size of my OST file?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Follow the steps below to check the size of the OST file:<br\/>\u2705 Open <strong>Outlook<\/strong> and go to the<strong> File<\/strong> tab.<br\/>\u2705 Click on <strong>Account Settings<\/strong>, then select <strong>Account Settings<\/strong> again.<br\/>\u2705 In the <strong>Data Files<\/strong> tab, you&#8217;ll see a list of your data files along with their sizes.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1747292520343\"><strong class=\"schema-faq-question\"><strong>Q2. What should I do if my OST file exceeds the maximum size limit?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> If your OST file exceeds the maximum size limit for your Outlook version. You can use either the manual method or an OST Splitter Tool to divide the file into smaller parts.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1747292551023\"><strong class=\"schema-faq-question\"><strong>Q3. Will splitting my OST file affect my Outlook data?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> No, using an OST Splitter Tool preserves the structure and formatting of your data during the splitting process. It ensures that your Outlook data remains intact.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1747292576966\"><strong class=\"schema-faq-question\"><strong>Q4. Can a large OST file cause Outlook to stop responding?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans<\/strong>: Yes, if the OST file becomes too large, Outlook may slow down or stop responding entirely. This is because the program struggles to process and load such a heavy data 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;4749&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;4&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 - (4 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;What happens if my OST file becomes too large? Expert Guides&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 - (4 votes)    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Summary:- Generally, the OST file stores an offline copy of your important emails, contacts, and attachments. Over time, as more<a class=\"read-more ml-1 main-read-more\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/\">Read More<\/a><\/p>\n","protected":false},"author":2,"featured_media":4750,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[139],"tags":[],"class_list":["post-4749","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>What happens if my OST file becomes too large? Expert Guides<\/title>\n<meta name=\"description\" content=\"Learn expert tips to fix oversized OST files when they become too large in Outlook. Get the best solution to manage and reduce OST file size.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What happens if my OST file becomes too large? Expert Guides\" \/>\n<meta property=\"og:description\" content=\"Learn expert tips to fix oversized OST files when they become too large in Outlook. 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He is an expert Email Forensic, Cloud Computing, and a passionate nerd with over 10 years of experience in technical content writing. He writes about Cloud Migration, Database Recovery, Email Backup, Windows, Mac, and Tech.\",\"url\":\"https:\\\/\\\/www.arysontechnologies.com\\\/blog\\\/author\\\/rohan\\\/\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/www.arysontechnologies.com\\\/blog\\\/ost-file-becomes-too-large\\\/#faq-question-1747292450248\",\"position\":1,\"url\":\"https:\\\/\\\/www.arysontechnologies.com\\\/blog\\\/ost-file-becomes-too-large\\\/#faq-question-1747292450248\",\"name\":\"Q1. 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Expert Guides"}]},{"@type":"WebSite","@id":"https:\/\/www.arysontechnologies.com\/blog\/#website","url":"https:\/\/www.arysontechnologies.com\/blog\/","name":"Aryson Technologies Blog","description":"Latest Technical Tips &amp; Tricks","publisher":{"@id":"https:\/\/www.arysontechnologies.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.arysontechnologies.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.arysontechnologies.com\/blog\/#organization","name":"Aryson Technologies Blog","url":"https:\/\/www.arysontechnologies.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.arysontechnologies.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2022\/07\/cropped-logo.webp","contentUrl":"https:\/\/www.arysontechnologies.com\/blog\/wp-content\/uploads\/2022\/07\/cropped-logo.webp","width":247,"height":60,"caption":"Aryson Technologies Blog"},"image":{"@id":"https:\/\/www.arysontechnologies.com\/blog\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.arysontechnologies.com\/blog\/#\/schema\/person\/38690c15f14d77f91207a5427b11e5a2","name":"Rohan Wiese","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/04068e84d014f4cd8f4d3caeec2e3949c4ab1020004486d628e8ca23c5907035?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/04068e84d014f4cd8f4d3caeec2e3949c4ab1020004486d628e8ca23c5907035?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/04068e84d014f4cd8f4d3caeec2e3949c4ab1020004486d628e8ca23c5907035?s=96&d=mm&r=g","caption":"Rohan Wiese"},"description":"Rohan Wiese is a Technical Writer at Aryson Technologies. He is an expert Email Forensic, Cloud Computing, and a passionate nerd with over 10 years of experience in technical content writing. He writes about Cloud Migration, Database Recovery, Email Backup, Windows, Mac, and Tech.","url":"https:\/\/www.arysontechnologies.com\/blog\/author\/rohan\/"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#faq-question-1747292450248","position":1,"url":"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#faq-question-1747292450248","name":"Q1. How can I check the size of my OST file?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> Follow the steps below to check the size of the OST file:<br\/>\u2705 Open <strong>Outlook<\/strong> and go to the<strong> File<\/strong> tab.<br\/>\u2705 Click on <strong>Account Settings<\/strong>, then select <strong>Account Settings<\/strong> again.<br\/>\u2705 In the <strong>Data Files<\/strong> tab, you'll see a list of your data files along with their sizes.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#faq-question-1747292520343","position":2,"url":"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#faq-question-1747292520343","name":"Q2. What should I do if my OST file exceeds the maximum size limit?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> If your OST file exceeds the maximum size limit for your Outlook version. You can use either the manual method or an OST Splitter Tool to divide the file into smaller parts.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#faq-question-1747292551023","position":3,"url":"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#faq-question-1747292551023","name":"Q3. Will splitting my OST file affect my Outlook data?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans:<\/strong> No, using an OST Splitter Tool preserves the structure and formatting of your data during the splitting process. It ensures that your Outlook data remains intact.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#faq-question-1747292576966","position":4,"url":"https:\/\/www.arysontechnologies.com\/blog\/ost-file-becomes-too-large\/#faq-question-1747292576966","name":"Q4. Can a large OST file cause Outlook to stop responding?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans<\/strong>: Yes, if the OST file becomes too large, Outlook may slow down or stop responding entirely. This is because the program struggles to process and load such a heavy data file.","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/posts\/4749","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/comments?post=4749"}],"version-history":[{"count":1,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/posts\/4749\/revisions"}],"predecessor-version":[{"id":4756,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/posts\/4749\/revisions\/4756"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/media\/4750"}],"wp:attachment":[{"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/media?parent=4749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/categories?post=4749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/tags?post=4749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}