4gb class6 sd card written but having unallocated memory 5.71gb is corrupted i tried everything using control panel disk management, cmd disk part method in all fat32 ntfs, easeus partition and recovery, quick format, change in regedit to change its write protection, sd card adapter in case it is write protected. i tried everything which i had but this sd card is not formating. Is there any way to format it?? if there is any way please let me know.