If you want to carry multiple PST files and avoid data loss problems, you need to merge all PST files into one. You can manually accomplish this task if you have strong technical knowledge and have limited PST files. If you have large number of data files, manually it is very easy. It allows you to merge Outlook data files such as emails, calendars, contacts, notes, and others. It supports merging PST files in Outlook 2019, 2016, 2013, 2010, etc.
This PST Merge software enables you to combine or merge multiple MS Outlook personal folder data file into single PST file. The software has advanced options like removes duplicates and junk folders of PST file, Merge any size of Outlook PST file. So by using this PST Merge tool, you can easily merge large PST files into single PST completely and safely. You can also attempt the free trial version of this software. You can visit here for more data:-http://www.sametools.com/merge/pst/