Unable to send files from PC to flash drive on WDTV LIVE

I can see the thumb drive in my network, I am able to start a transfer but it just says connecting forever and then locks up.

I am using Vista, dd-wrt router and a WAP.  thanks

looks like I can transfer small files but large movie files do not.

is this a known issue?

I too have this issue, trying to write to a USB external drive on WDTV Live Plus. I can rename files, delete files, create new folders. But if I try to actually upload a video file to the WDTV live drive, it get an error.