Toshiba has expanded its range of portable memory formats with two new families of branded USB memory products. Designed to address both standard and high-end user requirements, the devices are available with medium- or high-speed operation, and have storage capacities from 256Mbytes up to 1Gbyte. Operating with medium data transfer speeds, the memories are designed to provide the storage and performance required by a variety of consumer, office and other common applications. They read speeds of up to 18Mbytes/s and write speeds of up to 12Mbytes/s.