Memory Ten is a leader in Memory Stick Pro Duo Cards, providing 64MB, 128MB, 256MB, 512MB, 1GB, 2GB and 4GB capacities.

Memory Stick is a removable flash memory card format, launched by Sony in October 1998, and is also used in general to describe the whole family of Memory Sticks. This family includes the Memory Stick Pro, a revision that allows greater maximum storage capacity and faster file transfer speeds; Memory Stick Duo, a small-form-factor version of the Memory Stick (including the Pro Duo); and the even smaller Memory Stick Micro (M2). In December 2006 Sony added the Memory Stick Pro-HG, a high speed variant of the Pro, to be used for high definition still and video cameras.