I have a problem, i have cd's that I keep data on and most of them I burned on my old computer using nero which worked real good and I could add data to them with no problem but now I got a new hp computer and it came with sonic now burner software an it works good burning cd's or dvd's also has lightscribe which works good. the problem is I can't add any data to disks that already have something on them eve though disk info says that it is appendable and has room. I thought maybe it was because I burned some of the information using nero, but I tried using a new disk with sonic and then I went back to it later and had the same problem. can anyone help? what is the best burner software?