sorry I cannot help you there, at first i just went (on the linux side) to computer then network and found my shared pc drive and dragged and dropped, however a 20GB file can take 2-3 hours or longer to transfer this way
much easier to format an old drive with ext (linux) partition using partition magic or paragon and then use the mount command...on the windows side, there's free open source drivers to recognize that disk...so you are basically sneaker-netting...but WAY faster than using the 100mps ethernet port
even better to follow the instructions here and recompile the kernel to support udf 2.5 ....