xdj rx usb recording issue

I have the xdj rx system I never had a problem recording but recently

i hit the master record button all seems to work but  my mix does not seem to be saving to the usb key and can not find the mixes anywhere.. past mixes are there on the usb so  i even deleted them to make space and yet nothing new is saving  when i record..  yet the usb is  working fine with saving files and so on...