Permission Denied While executing Workflow

Permission Denied While executing Workflow

I am trying to set up a workflow to copy the contents of one directory on serverA to a directory on serverB. I am using the copy file feature and the config looks like this:
 
Destination Device: SeverA
File name: F:\Design\Instructions\pdf\JATEST*.txt
Destination Folder: D:\Inetpub\ftproot\assemblyinstructions
 
info/Device = ServerB
 
The error I am getting is:

Error # while using local credential [No Login] - Permission denied

 
I cant seem to find a place to populate the credentials for this workflow.

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