Designed to support read and write speeds up to 80 megabits per second on high speed enabled devices1, it is our fastest Memory Stick PRO media yet. It is also our most durable, with a wider operating temperature range of -13 F to 185 degrees Fahrenheit. Featuring an amazingly compact design and a capacity of 256 Megabytes with 220 Megabytes available, the MSX-256N is designed especially for users who demand the finest storage media at the best possible price. It is even backwards compatible with most devices that use standard Memory Stick PRO media, so it's the perfect upgrade for today's devices... and tomorrow's.