Adding external drive,new content directory

[Alanmci]

Hi there
This is my first post on this forum, I have used minim for only short time. I have moved my music files onto an external drive on my mac and deleted them from the main drive which was very full. How do i add a new content directory, it is currently /Users/alanjen/Music but each of my attempts to add the new drive seagate exp/ music 2 flag up a red message " not an absolute path , correct highlighted value and retry " as you will realise I am not very IT literate, please help !!

Alan