If you're having issues with FCP not consolidating a library, you can recursively search the library for files that are aliases, and are linking to certain directory or volume.
This will find anything in the home directory, ~/Desktop, ~/Documents, etc
cd "~/Movies/My Library.fcpbundle"
find . -type l -ls | grep /Users/darren/
This will find anything linked that's on the volume "14TB"
cd "~/Movies/My Library.fcpbundle"
find . -type l -ls | grep 14TB
Then you can right click the event, and consolidate.
Check the offending file is consolidated by selecting it in the FCP event. Consolidating sometimes still doesn't work, you might need to resort to creating a YYYY-MM-DD folder in your Original Media location for the file's created at date, dropping it in there, temporarily moving or renaming the offending file so FCP sees it as missing, then relink it in FCP.