Professional Ultra SanDisk 64GB MicroSDXC Card for Nokia Lumia 521 Smartphone is custom formatted for high speed, lossless recording! Includes Standard SD Adapter. (UHS-1 Class 10 Certified 30MB/sec) This SanDisk MicroSDXC card's specifically designed for your Nokia Lumia 521! Share your content collections with friends, family and colleagues easily. SanDisks removable storage solution specifically designed for mobile phones with expansion slots. Its ultra-small size consumes very little power from your handset, to give you longer battery life on your phone. Now you can instantly move pictures between multiple devices for sharing and printing using this card as well.