OUR PROMISE?When you enjoy the convenience brought by our usb memory stick, you will also get our high-quality service. All USB stick products have been constructed in high standard and tested rigorously before shipping. If there are any problems, please contact us at the first time, questions will be responded to within 24 hours. Lightweight, Portable? This USB C flash drive high-capacity memory stick adopts a metal shell. Photo stck is strong and durable, and the top of the shell is provided with a key hole, which is easy to carry and use and not easy to lose. Default Format?The USB C flash drives default format is exFAT, It is more suitable for 128GB than FAT32. (1:exFAT has better transfer performance 2:FAT32 does not support individual files over 4GB). Some devices can only recognize the FAT32, you can format the USB stick to FAT32 before use (Maybe you need the format software, like DiskGenius). For most car audio/projector/printer/speaker and some cell phone, you need use the FAT32 memory stick. Data Transfer and Storage?The USB flash drives testing read speed 420MB/S, testing write speed 210MB/S. (Testing device and software: USB 3.0 computer and H2testw.) Usually the device's type and file's type can affect actual usage speed, The actual use speed is about three times the USB 2.0 drive. Backwards compatible with USB 2.0,easy to complete the storage and transport functions. Plug and Play?The USB C flash drive is plug and play, there is no need to install any software. This USB drive bridges multiple devices without the need of an adaptor, to be able to transfer files between the OTG Type C Android phone/tablet, laptop and PC. The USB memory stick is compatible with Windows, Linux and Mac OS.