Currently, the Download options for these transformers take an ID. To determine the ID based on the file name, you need to:

• retrieve a list of the files in the remote directory where the file is located,
• filter out the returned features to find the one that matches your file name,
• download the file by id.

Here is an example of what it looks like:

Here is the workspace:

box-download-file-name-unknown.fmw