Saving re linked audio?

[Tom Case]

Hi, I opened a session and the drum tracks were greyed out, with the missing audio dialoge. I closed the session, plugged in my back up drive, and the session opened up correctly.

So, how do I import the audio from the back up session folder, back into the main session folder on my main audio drive? I did make a copy session with the audio copied, but I would also like to have those tracks back where I want them.

Thanks everyone

Tom