I have a xbox pro and wanted to upgrade to a new xbox 360 harddrive with more space. So i got a 250gb harddrive to transfer from my 60gb previous one. I followed all instructions and tryed every way possible but the new OFFICIAL xbox 360 harddrive and OFFICIAL cable arent being reconized. When i connect it to my xbox on top it says unformated so i select format and it says error when performing that action. Now im stuck there. If you have any ideas let me know. Should i reset my console? or cache?