Location

• Windows Backup keeps log files in "C:\Windows\Logs\WindowsBackups" by default. You may not be able to see this folder or its contents if you aren't an administrator on your computer.
  
  

Skipped Files or Folders

• If Windows skips any files or folders during the backup, Windows notes them in a ".log" file. You can use Windows Notepad to open this file to view the skipped files or folders.
  
  

Detailed Logfiles

• You can view a detailed event log using Windows Event Viewer. Select "Open Saved Log" and navigate to the log's location. Event Viewer will open ".etl" files.