How can I reduce the size of an Outlook PST file by compacting it?

[dannyboil]

You can use the compressed PST software to reduce and minimize the size of Outlook PST file data. It helps users remove extra space from PST file data, making the PST file more effective and smaller. You can increase Outlook's performance and free up important storage space by compressing PST files. To finish the procedure quickly and simply, use the Compress PST program, choose the PST file data you wish to compress, and adhere to the on-screen directions.
Read More: https://www.osttopstapp.com/compress-outlook-pst.html

[anjelanicholes]

An excellent tool for reducing the size of PST data files (https://www.pcinfotools.com/compress-pst-software/) is Pcinfotools Compress PST Software. The tool is excellent for preventing corruption in large files. It is among the greatest ways to lessen the size of PST files and prevent corruption. The fantastic program safely and quickly works with ANSI and UNICODE PST files. Without erasing any data, it quickly and easily reduces the size of Outlook PST files. This program supports all versions of Windows OS and Microsoft Outlook. Download the software's free trial version on your Windows computer.

[alexa156]

If your Outlook PST file has grown large over time, Shoviv PST Compress and Compact Tool (https://www.shoviv.com/pst-compress.html) is a straightforward way to reduce its size without deleting any data. Unlike Outlook's built-in compact feature, which can be slow and sometimes unreliable on large files, this tool efficiently shrinks PST file size by removing unused white space left behind by deleted items — while keeping all your emails, folders, and metadata fully intact.
A free demo version is available, letting you test the compression process on your own file before purchasing the full license.

[somit]

If you want to compress or compact an Outlook data file then you can do it manually using Outlook. But this method does not work always because compact now method shrink the file size 5 to 10 percent which is increase after some day.

So i would like to suggest split the data file into Two or more PSTs (https://www.mailsdaddy.com/pst-split-tool/). MailsDaddy PST Split tool has 4 different methods to divide PST file by size, date, email and folder. When split the data, you can still open in Microsoft Outlook without any technical hassle. And expand the PST file size easily without any technical knowledge.