How to format write protected sd card 8 gb

When yu try to access the SD card is it asking for a password ? If it is then to format a write protected SD card you have to enter in the password to release the write protect and then you can format it. If when you bought the SD card it came with write protection enabled then you have to contact the seller to provide the unlocking code.

Could you find a switch on this SD card to unlock the write protection?
If you cannot find such as switch, you can remove it as bellow:
http://www.itrelated.info/remove-write-protection-from-...
Do you have something important files on this card?
If you do, you should firstly back up them well before the format. If you cannot access them anyhow, you can try a free memory card recovery tool: http://blog4mark.blogspot.com/2013/01/memory-card-recov...
At last, you could format this SD card as you wish.