Samsung HR720 120 Gb Dvd Recorder

Spec (on this site)says 120GB but it is 80 GB. This is a very good dvd/hdd recorder but time needed to understand instructions ...132 pages. All other attachments : tv, vcr and the 720 have to be unplugged while scart, ariel, video out, etc are connected, so if at first you don't succeed...you will! The hard disc recording is good but not yet recorded a dvd successfully as awaiting suggested compatible media. Used a packard bell dvd-rw but unsuccessful with that so will wait for the right media and then hope to get cracking.