ADT GPS Tracks Almost Lost

I just had to do a partial reinstall of Windows 10 today.  And since I haven't made a back-up of my My Places in Google Earth recently, I almost lost my main line track of the American Discovery Trail.  But I just remembered that when you save your My Places, it just goes to a file on a hidden directory.  I found it and made a copy, but it wasn't necessary because the new installation of Google Earth just picked it up.  All of my ADT tracks are in tact as far as I can tell.  But I won't be able to make an external backup for a couple days or so.