If you want to split oversize Outlook OST files, then you can try the best OST File Splitter tool. This software is a backup of your email data that is kept offline. To repair a large-sized OST file, we can either permanently delete your emails from the deleted items folder or archive your OST file. This tool helps if the size of the OST file is greater than the size limit, you must split OST file into smaller sizes. Although, the users can divide Outlook OST files by size, date, sender’s name, and folder. Furthermore, OST file contains emails, contacts, and tasks, so it can easily split OST files into multiple OST files to avoid data corruption.