Pictures from External Hard Drive not showing up in Collections.

Hello,

I store all my creative assets on an external hard drive, synced to OneDrive When I create a collection in Bridge the pictures not all the pictures I have stored on the external hard drive are showing up.

 Update: The pictures do show up in my collections when I browse to the folder containing the pictures within Bridge. How do I sync all my pictures in Bridge without having to manually visit every folder?

Mike