Type-C USB-C USB-A Memory Card Reader Micro SD/SD OTG For PC Macbook Tablet Features: High-Speed USB 2.0 data transmission Supports Micro SD, TF, SDHC, SDXC card Supports FAT 32 file system of Microsoft Windows. Not Compatible with NTFS & exFAT Ports: 1x USB 2.0 Type C Male Connector (Typically used to plug into a USB C female port of a tablet, smartpohone or Macbook) 1x USB 2.0 Type A USB Male Connector (Typically used to plug into a USB female port of a laptop) 1x SD/MMC Slot for SD card of a digital camera or a micro sd card with a SD adapter 1x Micro SD/TF Slot for a typical micro sd card, which used to be called "tf card". Reading/Writing Speed: The reading speed depends on what class(class 6/class10) the memory card is.  For Class 6 card, it will read at 11-16MB/S and write at 6-8MB/S. For Class 10 card, it will read at 19-21MB/S and write at 24-26MB/S Capacity limitation: There is no capacity limitation in accordance with the USB standard, and 64G/128G/256G memory cards can be read.