ChrisSU, finally found that option to disable MP3(and delete existing MP3 files) by playing around with the interface.
Oddly, still cant just delete them from LQ folder using a laptop. I did find that if you right click and select ‘properties’, there’s a sh*t load of options to change stuff on the US. I didn’t want to accidently ruin anything and I think it’s now busy deleting them using the interface instead. Well, it said it was anyway.
Managed to do the update on the Superuniti easily enough too without hick-up or even using the instructions !
Best,
Ray.