After a recent Windows10 reload,  I have a CSV file in my User folder.  By the contents, it looks as old as my pre-Win7 OS associated

with Mail.

I have updated and added contacts since the WIN10 and Essentials reload, but that CSV file doesn't appear to change.

IS there a CSV file in the bowels of the Live Mail  programme????  Where can I find it  to protect it and or verify it gets backed

up when I run File History.  

Does it even get backed up with File History??????