300 gib hard drive cant upload more than 35 gigs

one feature that i like using atv flash is being able to ftp into my appletv (which is a 40gig apple tv) and upload new videos into there. thats awesome.

but i recently turned my apple tv so the main hard drive is my external 300 gib hard drive. well everything i try to upload, i cant upload past 35 gigs worth of matieral, i would hvae to delete it. i have to disconnect the hard drive and then connect it to my computer and copy all the information.

i feel like there is a cap on the upload because i guess atv flash sees the usb hard drive as 40 gig max because thats what my apple tv was. any clues on to fixing this issue?