To my knowladge the N800 wont register more than 2GIGs with the stock kernel.... If you formatded the card in xterm than I am sure is using vfat16 and thats where the problem is. You need to stick it in a PC running Linux or Windows and formated to fat32... I had the same issue with the 4GIG card... I solved it using gparted and formatting the card to fat32. You can use the SDHC Kernel to enable 8GIG cards withouth having to go thru this hasle...