Hello Alex and Ari,
Pardon my naiveté, but would the Thumbnail Cache you’re referring to be the folder(s) that are separate from the bin/folder in the Browser in Final Cut Pro? The reason I ask is that I’m unfamiliar with their being anything other than my media files in these folders.
Perhaps I was unclear in my original post. The icons that I am missing are the icons in the Browser. Again, the media is there, it’s that Final Cut Pro is telling me the Media is “Off Line.”