Occasional Observations

Short of formatting and rewriting all the data en bloc, is there any software out there to defrag an USB-powered 1.8-inch HDD, running Vista? The built-in MS tool doesn’t do it, Executive Software is yet to respond to my week-old enquiry and while PerfectDisk RX is doing a fine job on fixed drives, it doesn’t want to touch the little ‘un even though I enabled the option to check USB drives.