Tek Republic TUC-300 Portable 12-in-1 USB 3.0 Card Reader USB 3.0 for maximum speed performance. Backward compatible with USB 2.0 Support SDXC (up to 2TB), SDHC, SD, Micro SDXC, Micro SDHC, Micro SD, MMC, MS Cards SD, SDHC, and SDXC cards are support in UHS-I mode up to 104 MB/Sec Plug-n-Play & Hot-Swap; Backwards compatible with USB 2.0 and 1.1 Supports Windows, Mac and Linux