Guralp Systems CMG-DCM build <10,000 - Manual (Page 154)

Acquisition Modules and Platinum Firmware Recording and Retrieving Data
Note the use of ssh's tilde ('~') escape followed by + to suspend the
ssh session and return to the calling PC, in order to run the scp command
with the mass storage device still mounted. The fg command (foreground)
returns control to the ssh session.
Windows users should follow the same procedure to log in, power up and
mount the file system. At this point, rather than suspending the ssh shell,
they can connect with WinSCP and navigate to the /media directory. The
recorded files will then be displayed and can be dragged and dropped to
appropriate locations on the PC:
MAN-EAM-0003 154 Issue E - February 2014