Toshiba revealed that it will launch two new series of secure digital, or SD, flash memory cards this fall that offer super-fast data transfer rates and read-write performance. The so-called Toshiba “high-speed series” will offer a maximum data transfer rate of 5MB per second, while the “ultra-high-speed series” will push transfer rates to as high as 20MB per second–double the rate of any other Toshiba-brand SD card. Both series will be rolled out first in Japan in October, then globally in November, a Toshiba spokesperson said.