Need Help With DPRNT to usb

Hi,
I need help getting the dprnt command to write to my usb flash drive i've written some basic macros using the dprnt command and they run fine but nothing gets output to memory or the flash drive so i'm assuming its trying to send it via rs-232 but my machine (2014 EC-500) does not have rs-232 and none of my other machines are set up for rs-232 anymore. I got rid off all my rs-232 stuff years ago. So is it possible to dprnt to the usb drive or memory and if so how is it done. I've seen that for the fanuc controls you can change a parameter to determine where the data is sent wether its rs-232, usb, dataserver, ect... I've been searching for 2 days now and been trying everything I can think of I even emailed the haas answer man and have yet to get a reply so im hoping someone has an answer for me.