Completely remove Google Backup and Sync from my Mac
Moving of the Backup and Sync from Google app to the Trash and emptying it only removes the application bundle. It doesn't uninstall the Finder Sync Extension, application script, 
 APFS container, preferences, etc.

You'd also want to remove the following &amp; reboot:

~/Library/Application\ Scripts/com.google.GoogleDrive.FinderSyncAPIExtension
~/Library/Caches/com.google.GoogleDrive
~/Library/Containers/com.google.GoogleDrive.FinderSyncAPIExtension
~/Library/Cookies/com.google.GoogleDrive.binarycookies
~/Library/Group\ Containers/google_drive
~/Library/Preferences/com.google.GoogleDrive.plist