Thanks, kind of going round in circles with the manual and using half the 320 and half the 320L manuals show the various bits I need! I think one big confusion was that I was seeing the Volume on its own and then trying to work out what to with it. I didn't realise I needed to delete that and then treat each folder differently. Job done.......sort of!
I have the users and permissions now set to each user and when I click into the NAS on the PC, I can see these folders and access mine with a password being required for the others. I set them up with the admin account in the main control panel but in there I cannot see ANY folders or the volume itself for each of the users. Is this correct?
Also, with UPnP set-up and the media files given "public" permissions, the Xbox and Blu-ray player cannot see the folders I created but can see the NAS itself. I can't see any settings I might have missed here.