Unable to write on Secure Digital(SD) Memory card ?
Secure Digital is a memory card format developed as a utility for portable devices. This memory card is being used in mobile phones, cameras and also computers. The SD memory card possess a write protect switch that unable data loss on memory disk. However this switch unable to boot or write on same and you can only read from it. To be able to write on the SD memory card, you should turn off the write protect lock by pressing the small switch backward(Below image refer).