Secure Digital
Modern UDMA-7 CompactFlash Cards and UHS-I Secure Digital cards provide data rates in excess of 89 MB/s and up to 145 MB/s, when used with memory card readers capable of USB 3.0 data transfer rates. As of 2011, Secure Digital memory cards received an additional option of a UHS-II bus interface. It increased the maximum data transfer speed to 312 MB/s.