Hi again Hillie,
Just letting you know whilst I have ordered a 64gb drive from Amazon, I thought in the meantime I'd download Rufus, latest version 4.2, which now has an option to format in Large fat32. I decided to reformat my large 512gb drive and can confirm it works, so your comment about Lexus "cutting & pasting" from previous manuals would seem to be correct as their supplied data is now incorrect. I have movies in .MP4 and audio in .WMA formats running and as you say, the screen quality is excellent.
I'll also try the film you recommended Ronal the Barbarian!
Thanks very much once again.
Colin