CSCS provides a data transfer service to get your files from/to CSCS file systems using globus.org endpoints: please check External Transfer for details.
CSCS also provides a Slurm queue xfer available on Piz Daint to transfer files from/to internal CSCS file systems, check Internal Transfer for this use case. The Slurm queue xfer can submit jobs directly on the nodes of the cluster supporting data transfer: please note that direct access via ssh to the nodes of this cluster is not allowed.