Copy "private" key on https://doc.zih.tu-dresden.de/data_transfer/datamover/#transferring-files-between-zih-systems-and-group-drive
https://doc.zih.tu-dresden.de/data_transfer/datamover/#transferring-files-between-zih-systems-and-group-drive mentions copying the private key, which is the public key in fact. Correct that!