We've seen several users have storage concerns in Outlook as their PST files fill up, threatening the entire mailbox. If the size of the PST files grows and there is a storage issue, it can influence the overall speed of Outlook. I recommend Sametools Split Outlook PST Software is the best and safest for dividing huge Outlook PST files into several smaller ones. This routinely yields 100% secure results with no data loss. Emails, contacts, calendars, tasks, and other items that can be easily saved in these Outlook PST files are classified as follows in the Outlook PST data files: This software is available in a paid, complete edition as well as a free demo version. This software provides a simple user interface that makes dividing Outlook PST files feasible for both expert and non-technical users. Large Outlook PST files can be split without having to open Microsoft Outlook. This software offers numerous partitioning choices based on size, year, and folders, allowing users to save Outlook PST files at their leisure. supports all Microsoft Outlook versions, including Outlook 2003, 2007, 2010, 2013, 2016, and 2019