telling cb to pic files up from a new location?

I’m still learning as this issue will demonstrate,
So I’ve been letting cubase save files to the default location when setting up a new project, issue is that this is a relatively small drive, so it’s now hurting my system. What I want to be able to do is copy these files to my main drive and tell cubase where they are but I can’t seem to find an instruction for this, can anyone one help?

Use the “Back Up Project…” feature. It will copy the entire project, with all audio to a new location. Read up on it first as there are a few important options.