Sorry if in the wrong area.

I have a PC that I want to copy its internal HHD partition c: as a folder to another external HDD.

The PC in question has a problem and won't boot. I have a thumb drive with Dabien 12 on it that I want to use to copy the entire c: drive to an external HDD. I have tried using Dolphin but it doesn't give me that option. Unlike windows, I can not right click a folder or use control/click folder to check multiple folders to copy. and then paste to the external HDD.This is frustrating...
All I'm trying to do is copy the entire partition to another drive so I can re-install my os on the internal and be able to copy the saved files back onto it.

Please help..