Windows Seven/64

 

Live Mail 11

 

My mail storage folder, %user/appdata/local/Microsoft/windows live mail% currently has about 3,500 edbXXXXX.log files some dating back almost 3 years.  Not too concerned with space but they also appear to be playing havoc with my backups.  Lots of info online re. this but all relating to %system32% etc.  Nothing pertaining to Live Mail.  Why are they building up?