I have over 1500 mp3 files that are available for download on a web site I look after. The files are various sizes and split between 20 folders. One folder has about 600 files.
What the owner would like for his visitors is to be able to select a number of these files, and the click on a Download button. The selected files would then be downloaded to a visitor nominated folder on his/her PC, with no further intervention by the visitor.