Sony 8 GB PRO-HG Duo HX Memory Stick MSPD with Memory Card Reader Capacity: 8GB Memory Stick PRO-HG Duo HX 30MB/sec read mode at 8-bit parallel data transfer. Faster data transfer can be achieved with HX and is four times faster than Memory Stick PRO Duo Speed. Speed varies upon the measurement conditions. Memory Stick PRO-HG Duo media can be used with Memory Stick PRO and Memory Stick PRO-HG Duo compatible products. Memory Stick PRO compatible products do not support the high-speed data transfer for use with this media.