How do i fix my write protected disk

[sixshooter06]

Hello,

every time i try to take a picture from my picture library and put it on my sd card it says that the disk is write-protected and i need to remove the write-protection or use another disk, it does the same thing when i try to take music off my itunes library and place them on my sd card. It was working fine yesterday but now that message pops up and i dont know how to fix it.

 

[dingo07]

your SD card probably has a little switch on either side - move the switch to the unlocked location