I use tftp server.
Use command line, connect with ssh client to MDS switch. In this case MDS9124.
MDS-TAPE-3S-01# copy running-config tftp:
Enter destination filename: [MDS-TAPE-3S-01-running-config]
Enter hostname for the tftp server: 10.55.0.33
Trying to connect to tftp server……
Connection to server Established. Copying Started…..
TFTP put operation was successful
Copy complete, now saving to disk (please wait)…