...
scp yourfile <$USER>@storage.hpc.rz.uni-duesseldorf.de:/gpfs/project/<$USER>
or use any scp client (FileZilla, WinSCP etc.).
...
sshfs <$USER>@storage.hpc.rz.uni-duesseldorf.de:/gpfs/project/$USER your_local_dir
...
...
scp yourfile <$USER>@storage.hpc.rz.uni-duesseldorf.de:/gpfs/project/<$USER>
or use any scp client (FileZilla, WinSCP etc.).
...
sshfs <$USER>@storage.hpc.rz.uni-duesseldorf.de:/gpfs/project/$USER your_local_dir
...