Ghost Solution Suite 2.5 destination drive will be overwritten

I have created a Boot CD & have booted to it.

I simply want to create a clone of the HDD so if it fails I can restore it either to another HDD or a VM.

But when I go select, Local > Disk > To Image, I select where I want to back the clone image to (an external HDD), but on the very last stage, it says that the destination drive will be overwritten.  Will this erase everything on my external HDD?

Thanks