contentDir setting for external HD for new user

[Scott]

I have mac mini, and all my 4T iTunes music database have been set in an external HD. The mini's internal HD music folder is empty. While I install MinimServer, the setting of "contentDir" is /user/mac/music which is no music in the Dir. So I try to add new contentDir with the name of my ext HD, but it tell me "Not an absolute path".

Please teach me how to make correct input for an ext HD.
If the adding Dir can be done by browsing & selecting will be much better.

Scott