MSN consumes excessive harddrive space

Do MSN Folders really NEED to have 13.6 GB for one account and 10.7 GB for another account on a single computer? These older computers only have 40 GB in them.

The MSN folder in the Program Files directory appears to hold 13.6 Gb of hard drive space for and 10.7 GB for the other. Yet, I can not see any files over 112 MB. They sum total does not even approach 24.3 GB.

Losing hard drive space like crazy.