Can't Find Sound Effect Library on external drive

Hey all. I run my entire FCP X off an external drive. The sound fx work perfectly in the program itself- but when trying to locate the folder in the finder, to add downloaded sound fx- I can't find it anywhere.

/Library/Audio/Apple Loops/Apple/Final Cut Pro Sound Effects/ gets me nowhere

And when I go to the folder where I keep all my FCP stuff on the external drive- it's not there either. Help!
Thanks

FCPX needs to be kept on the system drive in the Applications folder. There is no reason to move it to an external drive and can cause problems. When you installed FPCX, did you run the "Download Additional Content" funcition found in the application menu?