Transfer speed is about four times faster than the Memory Stick Pro Duo Memory Stick PRO-HG Duo HX media card Read speed is approximately 50MB per second. Write speed with 4-bit parallel transfer is approximately 5MB per second or 40MB per second in the case of optimized compliant host device. Write speed with 8-bit parallel transfer is approximately 15MB per second or 120MB per second in the case of optimized compliant host device.
eBay