PST Compress and PST Compact Software
Large Outlook PST files are prone to corruption and before the user loses all his crucial data, it is better to split or compress the PST file. I would suggest you go for PST Compress and compact tool, it reduces the file size of PST files with all the attachments. For further information go through https://www.sysinfotools.com/blog/pst-compress-and-compact-tool/