4GB     read:16-20M/S  write:8-12M/S            class10
8GB     read:16-20M/S  write:8-12M/S            class10
16GB   read:16-20M/S  write:8-12M/S            class10
32GB   read:16-20M/S  write:8-12M/S            class10
64GB   read:16-20M/S  write:8-12M/S            class10

About 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 * 1000B

Operating system calculation method:

1GB = 1024MB = 1024 * 1024KB = 1024 * 1024 * 1024B

Therefore, the 1GB storage in the operating system is displayed as: (1000^3)/(1024^3)≈0.93GB

4GB = approximately 3.6GB-3.8GB

8GB = approximately 7.4GB-7.6GB

16GB = approximately 14GB-15GB

32GB = approximately 27GB-30GB

64GB = approximately 58GB-60GB

128GB =approximately 110GB-120GB

This 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.