I have a 500GB internal IDE HD that I pulled out of my old DirecTiVo and put into a USB 2.0 External HD enclosure. My idea was to hook this up to my 722K to use as an EHD. I plugged it in, connected up the USB to the reciever and the receiver said it needed to format the drive, so I told it ok. It then comes back with Format failed. I tried taking the drive and formatting it with windows (NTFS) and hooked it up and same thing happened. So does this mean I can't use this setup? Anyone else use an external HD case successfully (or is everyone just buying WD Mybooks)?