Final Cut Library Won't Load!

Question

My Final Cut Library, based on an external drive, won't load. It gets stuck loading certain events.
It all began earlier when my Library WOULD open, but it would take 10-15 minutes to do so. I finally realized it was because it was attempting to access thousands of PNG files on an external drive that caused the hangup. Noticing that the local machine drive handled these files much better than my external drive, I moved the folder of media to my local drive with the goal of reconnecting the media files.
Then, when I opened up my Library in Final Cut (after taking 15 minutes to do so), the event with the trouble files contained NO CLIPS within it whatsoever (in fact, the star Event Logo wasn't present next to the name of the event). The clips were still in the sequence that I had cut in, but they would not open in the media browser at all.
Now, trying the main Library again OR the local backup (from the Movies folder), the app gets stuck once it opens. I can't click anything within it.
I'm stuck, don't know what to do, am on a deadline, and would sure love some help. Thank you to any kind and knowledgeble souls out there!

Answer 1

All the files were being linked to the folder on the same external drive at the library is on. I.e., I "left the files in place." I figured if I just renamed that external folder, the files would register as off-line in the event, and I could relink the event to the copy of the files on my internal drive. Granted, I did not know you could use the consolidated feature in Final Cut Pro to relocate original files. I did it by hand in the Finder. The weirdest part of all, is that the event still remains in the library within Final Cut, but it's only text with no event logo next to it, and if I selected, all the original clips that were in that event have vanished, meaning I can't select and relink them.
Unless I can try what you're saying of inserting the files directly into the event folder within the library package, I'm having to create a new event and import the new files from the internal drive clean. It requires me to redo all my edit with the graphic files, but it seems I don't have much other choice. Even if I were to replace the graphic files back into the original event folder, they would still be running off of the external Drive, which caused the problem in the first place. So far, accessing the graphic files off the internal drive has gone lightning fast.