Many Thanks Dave !
Deleted the folders and re-booted the Mac Mini - the scheduled copy in SD is now shown as Iomega HDD - with no additional numbers !
Brilliant !
Just a thought - any idea what would cause these communication problems
( would TM trying to start during a back-up cause this ? ) although I don't think this is the case - the Mac is basically idle when SD runs ( ie no web browsing or other apps running )
BarryC