If you're using Outlook manually, the process can be time-consuming because you need to open each PST file separately and copy or import the data into a new PST. For users with multiple archive files, this quickly becomes repetitive.

A simpler approach is to use a tool like Advik PST Merge Tool , which can merge both ANSI and Unicode PST files into a single Unicode PST while preserving the original folder hierarchy, emails, attachments, contacts, and other mailbox items. This is especially helpful when consolidating old Outlook archives before migrating or creating a single backup.