?Warranty?Please rest assured that all USB thumb drives of KOOTION are high standard and have been tested rigorously before shipment. And you’ll get 24-Month Warranty, and Lifetime Technology Support. ?Plug and Play?No driver needed. Just plug high speed 128GB thumb drive into your device and it will work.The USB 3.0 flash drive (Default format: exFAT) supports Windows, Mac, Android, and Linux systems, can be used on PC, Mac, laptop, printer, projector, car audio, game console, smart TV, etc., compatible with USB 2.0/USB 1.1. ?Retractable Design, Small Size? The slide in/out design makes this thumb drive convenient to use and protects the connector from damage. This pen drive can be attached to keychain or backpack via the integrated lanyard hole, keeping your digital world close by. ?Reliable & Durable? The usb memory stick adopts Grade-A chips and global Top 3 flash memory particles, safeguards your data and transfers your data seamlessly. Quicker heat dissipation permits longer service life. Suitable for storing digital data for school, business or daily usage. With Small size, these flash drives are readily available wherever you go. ?USB 3.0 Ultra High Speed?The 128G 3.0S flash drive features USB 3.0 technology boosting Minimum Read speed to 110MB/s, Minimun Write Speed to 40MB/s, eight times that of USB 2.0 thumb drives, greatly shortening data storage and transfer process.