Access to a folder on a server for external users.

Hello, I have a folder on my server called newfolder. I need a solution that allows external users to access that particular folder, not any other folder on the server, and upload (but not delete or modify files on the server) individual picture and video files or folders directly from their computer harddisk, using a program/tool. I would appreciate if users do not need to provide a username and password of any kind to upload their material, but if its completely necessary, it will be so. NOTE: the newfolder has been defined outside the publichtml directory to keep other files private, and it's not password protected. The job is: define a solution that works according the description and propose a tool/s or program that in your best opinion solves the problem, like for example an ftp program, or tweak ui, or some other software you know that allows drag and drop files from your pc. Coder will provide all steps necessary to configure the application and the exe file you propose as an attachment.