First, the answer depends on your definition of "server". If you're talking about uploading files to a server, you probably mean a physical location to store data that SAS can access. Restricting that would typically happen at the operating system level: users would be granted/denied "write" access to that physical location in Windows, UNIX, or z/OS.
If you're talking about SAS Enterprise Guide, there is some ability through the roles feature to limit functionality that would make it easy to move data around. You can restrict "Open Data from Local Computer" and restrict the "Upload Files to Server" capabilities. You can also control through metadata security whether the user can write to libraries defined in the metadata. These measures should be used in addition to, not instead of, the OS security mentioned above.
We are using FTP client for uploading files to the server from where we will be importing the data to work in Enterprise guide.
The problem we are facing is that anyone can access the files uploaded by others. Due to space issue the files are getting deleted by other users. Is it possible to restrict the delete access for the users and also is it possible to find who has deleted the file?