SanDisk 8GB Ultra 15MB/s SDHC SD Class 4 Memory Card for Canon PowerShot A570 IS A580 A590 IS A630 A640 A650 IS A710 IS A720 IS D10 E1 SanDisk 8GB Ultra 15MB/s SDHC SD Class 4 Memory Card (SDSDH-008G-P36) for Canon PowerShot A570 IS A580 A590 IS A630 A640 A650 IS A710 IS A720 IS D10 E1 High performance card for cutting out the wait when transferring data from camera to PC. Higher capacity card for capturing more photos and longer videos. The most popular, most compatible memory format for digital cameras. 15MB/sec read speed. write speed lower. Based on SanDisk internal testing; performance may be lower depending upon host device.