Any way to make pool files all read from main project folder

I’ve just been importing guides form a client and I see towards the end of drum tracking the guide tracks are coming in from the External hard drive he handed me initially. Instead of having to go through each song and do a backup project to a new folder is there an easy way for Cubase to automatically copy all needed files to current project Audio folder?

So in simple terms some tracks are coming from an external USB key / hard drive but I want to make them come from the internal system drive. I cant see an option in the Pool to do that.