Booted into safe mode then a normal restart and now I can perform a verify - odd glitch it seems. If it happens gain I will post again. Can only assum...

The other functions you mention seem unaffected - can run them ok....

Here is the drive info: OWCTB3TBV4T32 S/N: 825571 there is another sticker with : S/N: 3042001464 Thanks Graham

here is the requested file - any help welcomed, thanks