That sounds strange, Maybe formating the card in sdhc usb reader could help. usb is slow, not sure if 110 minutes is normal, though. You may try to enable write caching for the drive in XP (=disable 'optimize for How did you format the card? You should better not use File Manager in 770 but format from PC over usb or even use card reader for this operation. OS2006 or hacker edition may not support formating big cards properly.