how to remove the CDFS partition & reformat it.
to your download folder or desktop and do a virus scan on it before extracting the files.
then run umptool2090.exe, click "settings", tick "need format"
then click the button 2nd from the right at the bottom of the form (the form isn't sized properly you may only see the top few pixels of the buttons so just tab until you get the correct button).
The settings form will close and the scan mode will show as "high level scan format".
Click the button that displays the drive letter & you should now have a clean drive with 1 partition.