Lucas123 writes: SanDisk has announced the world's highest capacity SD card, a 512GB model that represents a 1,000-fold increase over the company's first 512MB card that it shipped a decade ago. The SanDisk Extreme PRO SDXC UHS-I memory card has a max read/write rate of 95MB/s and 90MB/s, respectively. The card is rated to function in temperatures from -13 to 185 degrees Fahrenheit. The 512GB model retails for $800. The card also comes in 128GB and 256GB capacities.