You can try the manual method and split the Outlook PST file into smaller parts
- Microsoft Outlook should now be open on your computer.
- Go to the File Tab: In the Outlook ribbon, click the "File" tab.
- Choose Account Settings:
- Go to the "Account Settings" menu and select "Account Settings."
- Navigate to the Data Files Tab: From the "Email" tab, navigate to the "Data Files" tab.
- Choose the PST file to split:
- Select the PST file you want to split and then click "Settings."
- Compact: In the "General" tab, select "Compact Now." This will assist in compressing the PST file.
- Making a New PST File:
- Return to the "Data Files" tab.
- To create a new PST file, click the "Add" button.
But I suggest you professional way you can try the BetaVare Split PST Tool to split a large PST file while keeping the original contents intact. All MS Outlook versions are supported, including 2021, 2019, 2016, 2013, 2010, 2007, and 2000. Using this application will save you time and energy spent on splitting Outlook PST files. Our tool makes splitting Outlook PST files straightforward and secure. It protects data and eliminates all of the hazards associated with manual operations. Our app properly separates Outlook PST files while keeping all critical information. This device divides a large file into portions based on the year, folder, and size with no data loss.