I bought the same NZ900 but have problems with SonicStage 2.1 coming with it. When I format MD80s to HiMD it doesn't transfer. I wonder whether there are some MD80s which don't work in HiMD mode? I also had a problem with the 1GB MD which came with it. After I had successfully transferred quite a lot of music, I got an error message (can't remember what it said) and the whole thing collapsed. The disk now seems to be damaged. I have formated the disk but get "read error" after formatting seems completed. When I try to read it into SonicStage I get into a loop and have to shut down SonicStage. I wonder whether a higher version of SonicStage e.g. 2.3 would work with the NZ900