The directory on your cluster's file server to which HLAAssignCcs.exe will copy your input files.
For example, suppose
your cluster's file server is "\\Cluster1"
that user files go in file share "\\Cluster1\userFiles"
your input files are in directory "\\Cluster1\userFiles\myArea\job1"
externalRemoteDirectory would be \\Cluster1\userFiles\myArea\job1