Loops imported to Logic Loop Browser have vanished

Hi i'm quite a new mac user, i recently got logic as i swapped from PC to mac, and with out thinking i added all my loops from my external hard drive straight into logic loop brower, im not sure if i added them or just imported from the current location, but i'm trying to clean my mac hard drive up and i cant find the loops anywhere on my system, i've tried the folders people have suggested such as

libary/application support/logic etc
libary/audio/apple loops/ etc

theres just nothing in any of the files, i've even searched spot light for the individual files and found nothing, i thought this maybe because i hadnt imported to the mac hard drive and just left them on my external, but when i unplug the external hard drive, the loops still play from the loop browser, i've been trying to work this out for 3 or 4 hours and its driving me nuts as i'm new to mac and just cant work it out. and help would be greatly appericated.