Yes, there are many reliable software to split large Outlook PST files into smaller parts, but one of the best tools is
Softaken Split Outlook PST Software, large PST file split into small PST file and it support all Outlook versions and windows versions and its is split PST files by size ,date, or folder its support ANSI, Unicode and password protected PST files to split its is user friendly interface and easy to use for all technical and non technical user.