My memory card is water damaged. My Micro SD Card for Samsung Galaxy S4 (Sandisk) has lost all its data. There is no physical damage, and the photos seem to just have disappeared one day. There was more than 600 photos and videos of our first-born. The SD card does not register in the phone, and also not when it is put in a PC. When inserted in a PC the drive comes up but the size is shown as 0KB. These photos are of great importance to us and we would like to know if you can assist in recovering the data and how much it will cost."