We had to build our own 10 years ago. One thing we learned is to never allow FTP users to change, overwrite or delete files once uploaded. There are feature fla

We had to build our own 10 years ago. One thing we learned is to never allow FTP users to change, overwrite or delete files once uploaded. There are feature flags for that, I think we were using pureftp. Then our script moved all files out of the directory before processing.