Large Outlook offline mailbox files frequently cause synchronization errors and storage limitations, increasing the demand for split OST by size utilities to improve mailbox management. SysInfo OST Splitter offers a secure way to split large OST files into smaller PST files while avoiding data loss or corruption. The software allows users to divide mailbox data into predefined file sizes in MB or GB, which improves Outlook performance and reduces offline storage complications. One of the most notable features is the Split OST by Sender option, which separates mailbox content based on sender email addresses for easier mailbox categorization. It also allows you to split OST files by folder, saving selected folders separately into dedicated PST files for easier access and backup management. Another useful feature is the interactive graphical user interface, which makes the entire operation easier for both technical and non-technical users. Furthermore, the software maintains email formatting, metadata, attachments, and folder structure during the splitting process. The utility supports bulk OST file processing and is compatible with all Windows operating systems and Microsoft Outlook versions, ensuring reliable and efficient mailbox splitting performance.

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