Moving project to new Hard Drive
I did a movie project with the clips - used, unused and modified - on an external hard drive (External Drive 1). I would now like to move just the completed project and the associated clips used to complete it to another storage external hard drive (External Drive 2) where I have moved all my prior projects made on my iMac's hard drive (Internal Drive 3). I usually did this by dragging the four little square library icons from my iMac's hard drive (Internal Drive 3) to the storage external hard drive (External Drive 2). Then, if I needed to activate any of my prior projects, I just doubled clicked on the four little square icons and the library opened on my iMac. However, I do not see the four little square icons on the external hard drive (External Hard Drive 1) where I made my project. Instead, the four little square icons with the library name of my project appear on my iMac's Hard drive (Internal Drive 3) and will not show the project unless the external hard drive (External Hard Drive 1) is attached. Please tell me how to consolidate the library with the clips used to complete the project and move the library with the associated clips to my storage external hard drive (External Drive 2). If it makes things easier, I can initially consolidate the project with associated clips used to complete the project on my iMac's internal Drive (internal Drive 3). Thanks you in advance for your assistance.
iMac 21.5" 4K, macOS 10.14