Thanks. Suppose it makes sense when you say it like that

So, I make an MP3 cd first and then transfer it. All my MP3's are on my laptop so do I have to burn them to a CD and then load them onto the Sony or can I connect my laptop to the Sony and transfer directly?
I intend to get an external USB HDD in the future but have held off getting one to see which models other people have used with success on here. I should then be able to back up my MP3's onto the HDD and also trf to the Sony which thinking about it is a bit like having 2 backups of the MP3's.