Use the NAME command to indicate the name of the file being sent.
The NAME statement must come after a FILE command and should preceed any DATA commands.

The syntax is
  NAME     name  

name   is the name of the file

The name will almost certainly have local dependencies and/or restrictions.
For example, a UNIX based UFT server will not allow slashes in the filename.
How such details are dealt with is implementation dependent.

Naming the file is optional in UFT.