Hello everyone I have a SD memory card which is of local manufacturer it allows to read & copy from it but not write as it is now write-protected so i want to format that card but could not. To format this card I have tried

1) DD command

2) mkfs -f vfat command

3) creating registry entry under storage device policy in window with write value 0

4) disk part command in window to clear attributes in which it show all attributes are clear ie no write protection

5) I format card in windows through control panel -> administrative tools-> computer management -> disk management, then it show as formatted but when I tried to create new partition it give CYCLIC REDUNDANCY CHECK error

6) I downloaded a format utility from transcend site and formatted first it shows write protected again doing format it formats and tells to remove and reinsert after reinsertion it shows the previous data as it is