Google Drive Auto Backup is a feature of Google Drive that automatically backs up your files to Google Drive.
Google Drive Auto Backup is turned on by default. To turn it off, open Google Drive, click the gear icon, and select Settings. Under “Auto Backup”, uncheck the “Back up my files” box.
Google Drive Auto Backup will back up files that are:
In your Google Drive folder
In your Google Photos folder
In your My Documents folder
In your Desktop …