SD Card is a kind of non-volatile memory card, It’s an electronic flash memory data storage device used for storing digital information. Almost all digital products use SD card, Especially digital cameras, mobile phone, digital camera, and electronic recorder.
The advantages of SD card are compact, easy to carry and fast transmission. However, the stability is not good, and some human error. It cause sometimes the compute can not read the SD card which full of photos. It’s a very painful thing.