I can't format my 64g card

[cacho]

   Hi Neosaid,

Dear member of SanDisk Community, welcome.

Please, see if _have the logo SDXC _, in the camera or in guide.

If have the logo, return the card, it’s defective.

If not have the logo, then, use card up to 32GB SDHC.

Also, for some information on the topic, see the following article:
http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/HELP-how-do-i-reomove-write-protected-message-from-my-16gb-flash/m-p/323924#M8925

Luck.

Regards, Alfred.