Please make sure that the write protection switch is on the correct position as shown in the picture, or try using it with another carder reader or computer to exclude compatibility issues. 
For data rescue, please download the Transcend software RecoveRX.
http://www.transcend-info.com/Support/Software-4/
You could also format the card with a formatting software. Please refer to the following link:
SD Formatter5.0
https://www.sdcard.org/downloads/formatter_4/
*Notice: Formatting will erase all data from the memory card.
If the problem still exists, please kindly take the product with the receipt back to the original retailer and ask for a repair or replacement service.