registry issue

i ahve to manually backup my registry on a secondary Hdd that as windows xp Pro

whatfiles are the registry held in?

Unless I'm not understanding what you want? To back up the registry,create a folder wherever you like and name it such as 'regbacup' and perhaps date it. Go to start>run>type in 'regedit'(no quotes) press <enter> or <ok>. On the file menu click 'export'. Browse to the folder you created from the drop down menu. Give the file a name and click 'save'...

Or another way of backing up the registry is to go to All Programs>Accessories>System Tools>Backup, then in the Backup tab and select the "System State" checkbox.