USB 3.0 SD 4.0 Card Reader - For USB-A&C; Expand access to two SD card slots with the Compact USB 3.0 SD 4.0 Card Reader. Connect the Card Reader to your USB-A or USB-C desktop, laptop, tablet or smartphone that supports USB OTG with the included adapter. Quickly read and write high resolution images, video and data at speeds to 5 Gbps from up 12 different card types.