Yes, there is an possibility risk of losing PST passwords or encryption if you try to split PST files manually or with unreliable tools. However utilizing a specialist solution such as DataVare Outlook PST Split Expert Tool eliminates this risk because it is designed to manage both password protected and encrypted PST files safely. The software keeps all emails attachments organizational structures, and encryption settings intact during the splitting process allowing you to safely separate big PST files into smaller manageable sections without losing data security or availability.