Thanks for quick reply.
Yes, these files are stored in a folder on local machine. They are being created daily, and they have unique names. I'm fine with keeping the copies for history log in case i would need to validate some uploaded data. I want to leave it running on scheduled script without any user interaction, it FM runs on a VM. I would say even if i delete these csv files after upload that would work for me as i would still have these on ftp backup (if it's easiest way to just upload/delete files).