10pcs/lot TF Memory Card 4GB 8GB 16GB 32GB 64GB 128GB Flash Drive Memory SD Card for Monitoring Driving Recorder

4GB     read:16-20M/S  write:8-12M/S            class108GB     read:16-20M/S  write:8-12M/S            class1016GB   read:16-20M/S  write:8-12M/S            class1032GB   read:16-20M/S  write:8-12M/S            class1064GB   read:16-20M/S  write:8-12M/S            class10About real capacity:Due to different calculation methods, or the existence of faulty blocks, or some built-in software, the storage capacity of the USB flash drive may be less displayed on the PC. And the greater the capacity, the greater the deviation.Calculation method in the warehousing industry:1GB = 1000MB = 1000 * 1000KB = 1000 * 1000 * 1000BOperating system calculation method:1GB = 1024MB = 1024 * 1024KB = 1024 * 1024 * 1024BTherefore, the 1GB storage in the operating system is displayed as: (1000^3)/(1024^3)≈0.93GB4GB = approximately 3.6GB-3.8GB8GB = approximately 7.4GB-7.6GB16GB = approximately 14GB-15GB32GB = approximately 27GB-30GB64GB = approximately 58GB-60GB128GB =approximately 110GB-120GBThis is the calculated difference between the manufacturer and your PC, please get Google "USB Flash Drive Capacity" for more information.Photoshow:Notes:1. In order to avoid data loss or mechanical damage, please do not turn off the computer power during transmission.2. During use, do not remove the USB flash drive, otherwise data may be lost.3. After using the USB flash drive, it is best to safely eject the USB flash drive from the computer, which will help extend its storage life.4. Use FAT32 or exFAT to format the storage disk. Please do not format the USB flash drive frequently, otherwise the USB is easily damaged.5. Your devices (such as TVs, car players, radios and other devices that need to recognize U disks) must have the latest USB driver to recognize U disks. Many old school can only recognize U disks below 32G.8.If the U-disk can be recognized by Windows computer, but failure of recognized by other devices, then it is the problem is matter with other device not with the U disk, please pay attention, thank you.Usage suggestion:Please click "Safe Exit" in system before unplug the U disk after every time finish using.