If you ever get into a situation where you are trying to store your media outside of Final Cut Pro X’s event folder structure, and Final Cut keeps copying the original media into the Final Cut Events > Original Media folder (which happened to me after using FCPX’s Merge Events commend), here’s a workaround. What you CAN’T do is simply put an alias to the original media into your Final Cut Events folder – Final Cut is too savvy for that, and it won’t connect to the media.
The simple solution: create a new event (which you’ll delete momentarily), import the media you want with ALL options unchecked in the import dialog, and then immediately quit FCPX after the files appear in the event browser. You’ll see an alert warning you that all background tasks will be aborted if you quit. Quit anyway – you don’t need the render files it’s churning away on.
Then, in the Finder, open the Original Media folder of your new event, and drag all of the FCPX-created aliases into the Original Media folder for the event you’re trying to reconnect. Make sure FCPX is quit while doing this. Now delete the new event, and start FCPX.
Boom, all your original files are reconnected.