I need to create an ftp server so that users completely new to sending large files can send multiple files ranging in total size from 20MB to 100GB to my server from either Mac or PC.  I work with a lot of photographers and need to be able to receive their files, but not allow them access to any of the files sent to me.  I will then take the files from the server and move them to a Mac, if it makes any difference in networking.  Anyone know of a good server and or software package to get this done?