Use As A USB Flash Drive By Inserting A Me Eliminate the need to carry a separate flash drive with SD, SDHC, SDXC, MMC, and MMC 4.0 memory card types supported. Ultra High Speed Data Transfer Complies with SD 4.0 standards with Ultra High Speed II (UHS-II) data transfers of up to 300mb/s. USB 3.0 Plug-N-Play Compatibility Maximize the speed and performance of your memory cards with this certified USB 3.0 card reader. Backwards compatible with USB 2.0 devices. Supports HC And XC Memory Cards Supports SDHC (High Capacity) and SDXC (Extended Capacity) memory cards up to 2TB with transfer speeds up to 4.8Gb/s.