IncrediMail Backup Technique
IncrediMail An alternative e-mail tool with rich formatting capabilities as compare to other tools, usually stores your e-mail under the following folders but we can change location of store e-mail on other drive.
C:\Documents and Settings\User Name\Application Data\IM\Identities\
C:\Documents and Settings\User Name\Local Settings\Application Data\IM\Identities\
These are the default locations for IncrediMail e-mail to back up but best technique is that always use different drive for your important data and different drive for your system file.