My networking for home PC n Laptop confirm ok after troubleshooting them as block by Norton program.

Now, I am going to get this

So, this mini compo got HDD inside it. I set up the networking is to transfer files from PC to it after I converted from CD.

Now, question is that should I get somemore CD in the future or just download music from internet will do? Of course the legal way la but will the pricing be ok or even cheaper?