Marketing Information: Compact Memory Stick delivers reliable storage for high-resolution digital photos and video. Ideal for AVCHD recording. Actual usable memory capacity is approximately 3.66GB. Minimum write speed is 32Mbps when combined with optimized Memory Stick PRO format-compatible devices. Maximum transfer speed is 20MB per second. The Memory Stick PRO Duo can be used in products compatible with standard-size Memory Stick PRO media.