?Quality Guarantee?If there are any problems, please contact us at the first time. Our usb flash drive is with 12-Months Warranty, we will provide you either a refund or replacement. ?Actual Usable Capacity?The type c stick's actual usable capacity is about 92%. A small amount of storage space is used for formatting and other functions, computer and USB stick have different algorithms. the computer: 1GB=1024MB, usb stick: 1GB=1000MB. ?Default Format?The default format is exFAT. 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. ?Fast Speed?The testing write speed between 20MB/s and 40MB/s, testing read speed between 60MB/s and 90MB/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 USB2.0 drive. Backwards compatible with USB 2.0, easy to complete the storage and transport functions. ?USB A + Type C?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.