Portable DesignThis 256GB USB C flash drive is made of stainless steel, which is very durable and wear-resistant; it can be rotated 360 degrees for double protection, and it comes with dust cap to keep dust and dirt out.Fast speed 256GB USB C Flash Drive 3.1 deliver fast read speed of up to 150MB/s and a write speed of up to 100MB/s, data file transfer 4GB in second (actual speed may vary depending on the device and environmental conditions) The actual usage speed is about three times faster than a USB 2.0 flash drive. Backward compatible with USB 3.0/2.0 for easy storage and transfer functions. Wide Compatibility The flash drive usb c dual has two interfaces, namely USB-C and USB-A. The 2-in-1Thumb Drive supports compatibility with multimedia devices such as Android phones, Samsung, iPhone 15, computers, laptops, and Macs. Note: Not applicable to the Lightning interfaceDefault Format 256GB memory stick is exFAT format. Please make sure your devices match with the format accordingly so that it can work, some multimedia devices only support FAT32 . It can be reformatted into FAT32 or NTFS.Plug and PlayUSB Thumb Drive is no need to install any software for smartphone/PC. Simply plug the flash drive into the port and transfer data between your devices. Make sure that your smartphone supports OTG and turn it on before use