Hello I would like to backup my personal data on DVD-RW with a MSDOS batch. My script: set date_cour=%date:~6,4%%date:~3,2%%date:~0,2% set heure_cour=%time:~0,2%%time:~3,2%%time:~6,2% c: cd "C:\Program Files (x86)\CDBurnerXP" cdbxpcmd.exe --burn-data -tao -folder[\%date_cour%_%heure_cour%\perso]:D:\docs\perso My disc writer supports only track at once. I have one drive. This script works but each time I launch it, my DVD is erased and contains only my recent folder and not the other backup folders. Do you have an idea of the problem? Thank a lot.