Can someone tell me why I have 33 directories in C:\WINDOWS\Application Data\Identities for my Rogers email id's for Outlook Express?

I only have 3 in operational but activated all 6 in total for my web pages so I can get the 10mb/id usage.

Some of the files in some directories such as the outbox.dbx have email from 2 years ago. Do I need all these directories and if not how do I tell which 3 email id's are the ones that are in use so I can delete the rest?

Most of it is in this unreadable format
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but there are pieces of real words in the inbox and sent box etc. Some files are 44,000 in size. Thx in advance.