{"id":1764,"date":"2026-01-04T14:32:06","date_gmt":"2026-01-04T14:32:06","guid":{"rendered":"https:\/\/www.goldytools.com\/blog\/?p=1764"},"modified":"2026-01-04T16:53:49","modified_gmt":"2026-01-04T16:53:49","slug":"how-safe-splite-large-ost-file-into-smaller-pst-files","status":"publish","type":"post","link":"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/","title":{"rendered":"How to Safe Splite Large OST file into Smaller PST files"},"content":{"rendered":"<p>Large OST file can negative impact Outlook performance by slowdown ,crash and unexpected error .Splitting oversized OST files into small part for improve stability and smooth performance . This blog offer complete guidance for splitting oversized OST file s using both manual and automated methods.<\/p>\n<p><strong>Understanding OST Files:<\/strong><\/p>\n<p>In Microsoft Outlook ,an OST files plays a crucial role for locally storing mailbox data such as emails, contacts, calendars, tasks, and other items on system. OST file support offline access and ensure automatic synchronization of mailbox changes after reconnect to Exchange server.<br \/>\nMailbox data accumulate ,OST file become oversize, result in Outlook performance issue and unexpected error .Understanding when and how to split OST files for smooth Outlook function and effect data management.<\/p>\n<p><strong>Common issue cause by Oversized OST files<\/strong><\/p>\n<p>If OST file become too large ,it can cause performance slowdown and functional problem in Outlook ,including<\/p>\n<ul>\n<li>\tMicrosoft Outlook runs slowly or degraded performance .<\/li>\n<li>\tOutlook often hang or stop responding during use<\/li>\n<li>\tslow delivery of incoming and outgoing emails.<\/li>\n<li>\tIssue synchronize Outlook data with Exchange Server<\/li>\n<li>\tUnable to open OST file and add new data to it<\/li>\n<li>\tError notification appear frequently during mailbox operation<\/li>\n<\/ul>\n<p><strong>Reason for Split or reduce Large OST file.<\/strong><\/p>\n<p>Handle large OST file for Outlook better performance and improve data safety .Here why it matters:<br \/>\n<strong>Improves Performance<\/strong> -Ensure smooth Outlook operation and minizine load times<br \/>\n<strong>Prevents Data Corruption:<\/strong> Minimize risk of data corruption and file damage<br \/>\n<strong>Reduce Sync Error:<\/strong> Improve connection with Exchange Server<br \/>\n<strong>Easy of Manage:<\/strong> Smaller OST file are simple to manage and organize than working one massive file<br \/>\n<strong>Optimize Disk Space Usage:<\/strong> Manage Large OST file by splitting it and enhances system efficiency .<br \/>\n<strong>Reduce Crash and Freezing Issue:<\/strong> Managing OST file size reduce risk of Outlook hanging or crashing.<br \/>\n<strong>Maintains Regulatory Compliance:<\/strong> Splitting OST file to mailbox size limit set by organization for consistent and reliable email delivery\n<\/p>\n<p><strong>Manual Solutions to Repair or Split OST files<\/strong><\/p>\n<p>When an Outlook OST file become oversize ,it cause performance slowdowns ,synchronization issue, and data corruption .Outlook include several built methods to manage or split OST files .Below are most effective techniques<\/p>\n<p><strong>Method 1:: Archive Older Email to Manage OST File Size<\/strong><\/p>\n<p>Archiving move older or infrequently use email to separate PST file,reduce size of OST file while keep your data secure.<\/p>\n<ul>\n<li>\tOpen Outlook and navigate to File >Info>Tools>Clean Up Old Items<\/li>\n<li>\tSelect mailbox or specific folder you want to archive <\/li>\n<li>\tDefine data range ,such as emails older than six months<\/li>\n<li>\tSelect location where you want save the archive PST file and click OK<\/li>\n<\/ul>\n<p><strong>Method 2: Optimize OST file size by Compacting<\/strong><\/p>\n<p>Compact reduce OST file by eliminating unused space without delete any data<\/p>\n<ul>\n<li>\tOpen Outlook and navigate > File > Account Settings > Account Settings.<\/li>\n<li>\tIn data Files tab ,select OST file and Click Settings<\/li>\n<li>\tIn the opened dialog box, click Compact Now to reduce the file size<\/li>\n<\/ul>\n<p><strong>Method 3: Disable Unnecessary Add-ins<\/strong><\/p>\n<p>Unnecessary add-ins can slow down Outlook performance and increase load time with large OST file<\/p>\n<ul>\n<li>Open Outlook  > Options > Add-ins.<\/li>\n<li>Click Manage > COM Add-ins > Go<\/li>\n<li>Disable any unnecessary add-ins and click OK.<\/li>\n<\/ul>\n<p><strong>Method 4: Remove large Attachment and Empty Deleted items folder<\/strong><\/p>\n<p>Email contain large attachment use lot of storage .Moving or deleing attachment outside Outlook reclaim space<\/p>\n<ul>\n<li>\tUse search filter hasattachments : yes to find emails with large attachment<\/li>\n<li>\tSave important attachment to your computer local storage<\/li>\n<li>\tRemove email or attachment after saving<\/li>\n<li>\tEmpty the <strong>Deleted Items<\/strong> folder by right-clicking it and selecting<strong>Empty Folder<\/strong>.<\/li>\n<\/ul>\n<p><strong>Method 5: Disable Synchronization for Share Folders<\/strong><\/p>\n<p>Shared folder increase OST file size because continues syncing .Disable them reduce unwanted data accumulation.<\/p>\n<ul>\n<li>\tOpen and navigate  File > Account Settings > Account Settings<\/li>\n<li>\tChoose your account and click Change > More Settings > Advanced.<\/li>\n<li>\tClear uncheck box for Download Shared Folders and click OK.<\/li>\n<li>\tClose and Restart Outlook.<\/li>\n<\/ul>\n<p><strong>Method 6: Utilize Outlook Data Export Option<\/strong><\/p>\n<p>Using this method important mailbox data export to PST file, and reduce OST file size<\/p>\n<ul>\n<li>\tGo to File > Open &#038; Export > Import\/Export.<\/li>\n<li>\tSelect Export to a File > Outlook Data File (.pst).<\/li>\n<li>\tSelect require folder for export and define designation path<\/li>\n<li>\tClick Finish to save selected data into new PST file.<\/li>\n<\/ul>\n<p><strong>Method 7: Disable Outlook RSS Feed<\/strong><\/p>\n<p>RSS feeds unnecessarily increase OST file size .turn off them reduce mailbox clutter.<\/p>\n<ul>\n<li>\tGo to File > Account Settings > RSS Feeds.<\/li>\n<li>\tRemove and disable unwanted RSS feed subscription<\/li>\n<\/ul>\n<p><strong>Disadvantages of Manual Methods<\/strong><\/p>\n<p>Manual solution cost free and effective for basic maintenance ,but they come with several limitations<\/p>\n<ul>\n<li>\tArchived or shared data not accessible offline<\/li>\n<li>\tNo automation is available ,making ongoing manage time-consuming<\/li>\n<li>\tNot recommend for handling large ,heavily corrupted <\/li>\n<li>\tProvide minimal space saving and performance enhancement.<\/li>\n<li>\tProcess carry a risk of accidental data lose or lost attachments<\/li>\n<\/ul>\n<p><strong>Conclusion:<\/strong><\/p>\n<p>In this blog we discuss cause of oversized OST file and various way to manage it. Manual method reduce OST file they have limitation and not prevent recurring issue.<br \/>\nReliable and efficient solution ,using <a href=\"https:\/\/www.goldytools.com\/ost-to-pst-converter.html\" rel=\"noopener\" target=\"_blank\">Goldytools OST to PST convert<\/a> is recommend.it automates OST file splitting ,prevent data loss and maintain smooth Outlook functionality with minimal effort<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Large OST file can negative impact Outlook performance by slowdown ,crash and unexpected error .Splitting oversized OST files into small part for improve stability and smooth performance . This blog offer complete guidance for splitting oversized OST file s using both manual and automated methods. Understanding OST Files: In Microsoft Outlook ,an OST files plays &hellip; <a href=\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">How to Safe Splite Large OST file into Smaller PST files<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Safe Splite Large OST file into Smaller PST files - Blog - GoldyTools<\/title>\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.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Safe Splite Large OST file into Smaller PST files - Blog - GoldyTools\" \/>\n<meta property=\"og:description\" content=\"Large OST file can negative impact Outlook performance by slowdown ,crash and unexpected error .Splitting oversized OST files into small part for improve stability and smooth performance . This blog offer complete guidance for splitting oversized OST file s using both manual and automated methods. Understanding OST Files: In Microsoft Outlook ,an OST files plays &hellip; Continue reading How to Safe Splite Large OST file into Smaller PST files &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - GoldyTools\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/goldytools\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-04T14:32:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-04T16:53:49+00:00\" \/>\n<meta name=\"author\" content=\"harshit\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"harshit\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/\"},\"author\":{\"name\":\"harshit\",\"@id\":\"https:\/\/www.goldytools.com\/blog\/#\/schema\/person\/3d660bd5990e0d573cfc3406bcb83eed\"},\"headline\":\"How to Safe Splite Large OST file into Smaller PST files\",\"datePublished\":\"2026-01-04T14:32:06+00:00\",\"dateModified\":\"2026-01-04T16:53:49+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/\"},\"wordCount\":841,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.goldytools.com\/blog\/#organization\"},\"articleSection\":[\"OST to PST Converter\"],\"inLanguage\":\"en\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/\",\"url\":\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/\",\"name\":\"How to Safe Splite Large OST file into Smaller PST files - Blog - GoldyTools\",\"isPartOf\":{\"@id\":\"https:\/\/www.goldytools.com\/blog\/#website\"},\"datePublished\":\"2026-01-04T14:32:06+00:00\",\"dateModified\":\"2026-01-04T16:53:49+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/#breadcrumb\"},\"inLanguage\":\"en\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.goldytools.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"OST to PST Converter\",\"item\":\"https:\/\/www.goldytools.com\/blog\/category\/ost-to-pst-converter\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"How to Safe Splite Large OST file into Smaller PST files\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.goldytools.com\/blog\/#website\",\"url\":\"https:\/\/www.goldytools.com\/blog\/\",\"name\":\"GoldyTools\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.goldytools.com\/blog\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.goldytools.com\/blog\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.goldytools.com\/blog\/#organization\",\"name\":\"GoldyTools\",\"url\":\"https:\/\/www.goldytools.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en\",\"@id\":\"https:\/\/www.goldytools.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.goldytools.com\/blog\/wp-content\/uploads\/2022\/06\/logo-1.png\",\"contentUrl\":\"https:\/\/www.goldytools.com\/blog\/wp-content\/uploads\/2022\/06\/logo-1.png\",\"width\":193,\"height\":45,\"caption\":\"GoldyTools\"},\"image\":{\"@id\":\"https:\/\/www.goldytools.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/goldytools\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.goldytools.com\/blog\/#\/schema\/person\/3d660bd5990e0d573cfc3406bcb83eed\",\"name\":\"harshit\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en\",\"@id\":\"https:\/\/www.goldytools.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/ff5dc561c46b473e3b9f999b36693607?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/ff5dc561c46b473e3b9f999b36693607?s=96&d=mm&r=g\",\"caption\":\"harshit\"},\"sameAs\":[\"https:\/\/www.goldytools.com\/blog\"],\"url\":\"https:\/\/www.goldytools.com\/blog\/author\/admin\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"How to Safe Splite Large OST file into Smaller PST files - Blog - GoldyTools","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/","og_locale":"en_US","og_type":"article","og_title":"How to Safe Splite Large OST file into Smaller PST files - Blog - GoldyTools","og_description":"Large OST file can negative impact Outlook performance by slowdown ,crash and unexpected error .Splitting oversized OST files into small part for improve stability and smooth performance . This blog offer complete guidance for splitting oversized OST file s using both manual and automated methods. Understanding OST Files: In Microsoft Outlook ,an OST files plays &hellip; Continue reading How to Safe Splite Large OST file into Smaller PST files &rarr;","og_url":"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/","og_site_name":"Blog - GoldyTools","article_publisher":"https:\/\/www.facebook.com\/goldytools","article_published_time":"2026-01-04T14:32:06+00:00","article_modified_time":"2026-01-04T16:53:49+00:00","author":"harshit","twitter_card":"summary_large_image","twitter_misc":{"Written by":"harshit","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/#article","isPartOf":{"@id":"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/"},"author":{"name":"harshit","@id":"https:\/\/www.goldytools.com\/blog\/#\/schema\/person\/3d660bd5990e0d573cfc3406bcb83eed"},"headline":"How to Safe Splite Large OST file into Smaller PST files","datePublished":"2026-01-04T14:32:06+00:00","dateModified":"2026-01-04T16:53:49+00:00","mainEntityOfPage":{"@id":"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/"},"wordCount":841,"commentCount":0,"publisher":{"@id":"https:\/\/www.goldytools.com\/blog\/#organization"},"articleSection":["OST to PST Converter"],"inLanguage":"en","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/","url":"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/","name":"How to Safe Splite Large OST file into Smaller PST files - Blog - GoldyTools","isPartOf":{"@id":"https:\/\/www.goldytools.com\/blog\/#website"},"datePublished":"2026-01-04T14:32:06+00:00","dateModified":"2026-01-04T16:53:49+00:00","breadcrumb":{"@id":"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/#breadcrumb"},"inLanguage":"en","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.goldytools.com\/blog\/how-safe-splite-large-ost-file-into-smaller-pst-files\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.goldytools.com\/blog\/"},{"@type":"ListItem","position":2,"name":"OST to PST Converter","item":"https:\/\/www.goldytools.com\/blog\/category\/ost-to-pst-converter\/"},{"@type":"ListItem","position":3,"name":"How to Safe Splite Large OST file into Smaller PST files"}]},{"@type":"WebSite","@id":"https:\/\/www.goldytools.com\/blog\/#website","url":"https:\/\/www.goldytools.com\/blog\/","name":"GoldyTools","description":"","publisher":{"@id":"https:\/\/www.goldytools.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.goldytools.com\/blog\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en"},{"@type":"Organization","@id":"https:\/\/www.goldytools.com\/blog\/#organization","name":"GoldyTools","url":"https:\/\/www.goldytools.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en","@id":"https:\/\/www.goldytools.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.goldytools.com\/blog\/wp-content\/uploads\/2022\/06\/logo-1.png","contentUrl":"https:\/\/www.goldytools.com\/blog\/wp-content\/uploads\/2022\/06\/logo-1.png","width":193,"height":45,"caption":"GoldyTools"},"image":{"@id":"https:\/\/www.goldytools.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/goldytools"]},{"@type":"Person","@id":"https:\/\/www.goldytools.com\/blog\/#\/schema\/person\/3d660bd5990e0d573cfc3406bcb83eed","name":"harshit","image":{"@type":"ImageObject","inLanguage":"en","@id":"https:\/\/www.goldytools.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/ff5dc561c46b473e3b9f999b36693607?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ff5dc561c46b473e3b9f999b36693607?s=96&d=mm&r=g","caption":"harshit"},"sameAs":["https:\/\/www.goldytools.com\/blog"],"url":"https:\/\/www.goldytools.com\/blog\/author\/admin\/"}]}},"_links":{"self":[{"href":"https:\/\/www.goldytools.com\/blog\/wp-json\/wp\/v2\/posts\/1764"}],"collection":[{"href":"https:\/\/www.goldytools.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.goldytools.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.goldytools.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.goldytools.com\/blog\/wp-json\/wp\/v2\/comments?post=1764"}],"version-history":[{"count":2,"href":"https:\/\/www.goldytools.com\/blog\/wp-json\/wp\/v2\/posts\/1764\/revisions"}],"predecessor-version":[{"id":1766,"href":"https:\/\/www.goldytools.com\/blog\/wp-json\/wp\/v2\/posts\/1764\/revisions\/1766"}],"wp:attachment":[{"href":"https:\/\/www.goldytools.com\/blog\/wp-json\/wp\/v2\/media?parent=1764"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.goldytools.com\/blog\/wp-json\/wp\/v2\/categories?post=1764"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.goldytools.com\/blog\/wp-json\/wp\/v2\/tags?post=1764"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}