How to Split ANSI vs Unicode PST Files: Limits, Risks, and Best Practices
Splitting PST files begins by determining whether the file is ANSI (with a 2 GB limit) or Unicode (with a default of 20–50 GB, adjustable). Next, create more PSTs and move or archive content to keep individual files from hitting their limits or risking corruption. Following Microsoft’s size guidelines and utilizing compaction and registry warnings helps ensure safe splits and maintains performance integrity across Outlook versions.