Got a 510S yesterday and the Hard Drive and Machine in general works a charm however when I put in +R discs the machine says 'disc is unrecordable'. I have used Sony, Philips and TDK discs. I had a Goodmans machine previously and when I bought the discs formatted them in the Goodmans as it asked to do it everytime I put a new disc in so I thought Id do them all in one go in case I needed to record something quickly. I also have tried it with +RW Philips discs 1 worked and the rest said not enough space to record, I had formatted these in the Goodmans too. Do I have a dud machine or is it simply that I formatted the discs in the Goodmans and now cant use them in another recorder. I havent tried any 'brand new' discs yet.