microclient card flash backup

mount /media/usb0 -->USB disk

dd if=/dev/hda of/media/usb0/microclient...

to avoid your command from terminating when you close ssh use:
nohup dd if=... &

to access an NTFS fs in rw mode you have to install ntfs-3g and select it as fs type i.e. mount -t ntfs-3g /dev/sda /media/usb