C6300 Readyshare doesn't show hard drives

Tried connecting over 10 different USB hard drives and none would show up on the Readyshare USB list either through the routherlogin.net or through the \\readyshare on network. I then read manual and it claims there's only about 6 compatible USB devices. I went out and bought the WD 2TB Elements on the list, plugged it in and same thing...nothing shows up. I tried then formatting drive, it was already in NTFS, but formatted it and still nothing. I've gone into advanced settings on Readyshare and checked everything, I even tried going into advanced settings and approved devices, but no devices show up on that page either. What else can I do to recognize this device?