I'd like to copy a fairly large iTunes library onto a portable hard drive. I don't want to remove the original files from where they reside, just make another copy.
Any suggestions are appreciated.
Finder is able to make a copy and not remove the folder you copy by simple drag & drop or using CMD+C to copy the original folder and CMD+V on the external HDD.
Or do you want something different?
You also could use CarbonCopyCloner or SuperDuper to make a 1:1 copy of folders, the source will not be deleted.