Toshiba's new line of SD cards support the latest "SD Speed Class" specification from the SD Card Association, which guarantee minimum speeds by allowing host devices to check and read the cards tht are inserted in their SD slots. At the top is the "Ultra High Speed Series" sustaining 20MB/sec available in 512MB, 1GB, and 2GB capacities, and "High Speed Series" available in the same capacities guarantees transfer rates of 5MB/sec.

There are three classes in the SD Speed Class: Class 2 guaranteeing over 2MB/sec, Class 4 at 4MB/sec, and Class 6 at 6MB/sec. Toshiba's new cards fall into Class 6 and Class 4, and are compatible with existing SD card-supporting devices in addition to SDHC devies.



Inspired by:
http://pc.watch.impress.co.jp/docs/2006/0824/toshiba2.htm

Press Release:
http://www.toshiba.co.jp/about/press/2006_08/pr_j2401.htm