I just got my EPIC yesterday and tried to load pictures onto my computer, when I encountered this issue. The computer wouldn't recognize the EPIC as a USB device. I use windows 7 64, so I tried the 3g tether, downloaded drivers from samsung, uninstalled, reinstalled..nothing would work. Then, I happened to just see some comments that people said to try different USB ports. I tried the 2 on the front of my computer with no luck. I thought the suggestion to use the back USB ports was kind of silly, but nothing was working so why not try it. I climbed under the desk, plugged it in and guess what...IT WORKED. Now there are no issues with my computer recognizing the EPIC. So, I would reccommend using the USB ports straight off the board.