Here are some sample File workflows.

Copy File Packaged Within Catalog to Guest

{
  "id":"copy-file-to-guest",
  "name": "Copy File Packaged Within Catalog to Guest",
  "description":"Copy a File bundled within the CSAR under Artifacts/scripts to a remote machine",
  "version":"1.0",
  "startStep":"item0",
  "variables": [
    {"name":"vnfId", "type": "string"}
  ],
  "input": [
     {"name": "USERNAME", "description": "Username", "type": "string"}
    ,{"name": "PASSWORD", "description": "Password", "type": "password"}
    ,{"name": "IP", "description": "IP Address of the Guest", "type": "string"}
  ],
  "output": [
     {"name": "copyResult", "type": "string"}
    ,{"name": "createResult", "type": "string"}
  ],
  "steps":[
    {
      "stepId":"item0",
      "workflow":"COPY_FILE_TO_GUEST", "namespace": "nfv",
      "type":"task",
      "description": "Copy file",
      "inBinding":[
         {"name": "username", "type": "string", "exportName": "USERNAME"}
        ,{"name": "password", "type": "password", "exportName": "PASSWORD"}
        ,{"name": "ip", "type": "string", "exportName": "IP"}
        ,{"name": "inFile", "type": "file", "default": [{"name": "file.txt"}]}
        ,{"name": "workingDirectory", "type": "string", "default": "/tmp"}
      ],
      "outBinding": [
        {"name": "result", "type": "string", "exportName": "copyResult"}
      ],
      "nextStep": "END"
    }
  ]
}

Copy User Provided File to Host

{
  "id":"copy-file-to-guest-user-input",
  "name": "Copy user provided file to host",
  "description":"Copy user provided file to host",
  "version":"1.0",
  "startStep":"item0",
  "variables": [
    {"name":"vnfId", "type": "string"}
  ],
  "input": [
	{"name": "USERNAME", "description": "K8s master username", "type": "string"}
	,{"name": "FILENAME", "description": "Filename", "type": "file"}
	,{"name": "PASSWORD", "description": "K8s master password", "type": "password"}
	,{"name": "IP", "description": "K8s master ip address", "type": "string"}
  ],
  "output": [
    {"name": "copyResult", "type": "string"}
  ],
  "steps":[
    {
      "stepId":"item0",
      "workflow":"COPY_FILE_TO_GUEST", "namespace": "nfv",
      "type":"task",
      "description": "Copy file",
      "inBinding":[
         {"name": "username", "type": "string", "exportName": "USERNAME"}
        ,{"name": "password", "type": "password", "exportName": "PASSWORD"}
        ,{"name": "ip", "type": "string", "exportName": "IP"}
        ,{"name": "inFile", "type": "file", "exportName": "FILENAME"}
        ,{"name": "workingDirectory", "type": "string", "default": "/tmp"}
      ],
      "outBinding": [
        {"name": "result", "type": "string", "exportName": "copyResult"}
      ],
      "nextStep": "END"
    }
  ]
}