The content on an USB drive is most probably encoded in various file formats (mp3, avi, jpg, etc.) so no simple adapter would do. The best bet woult be to use a small computer or PC to decode the files into video and audio signals for the DVD player's inputs. It may be cheaper and more economic to buy a system, which supports USB inputs as they already have such computers built in. So sorry, no simple way of doing this that I know of.