China Newest USB Flash Drive 32GB 64GB 128GB Memory Stick Metal Pendrive 16GB Flash USB Stick 4GB 8GB Pen Drive Cle USB 32g Flash Disk

Production description
1. Capacities: 4GB 8GB 16GB 32GB

2. weight: 17g

3. Interface: USB 2.0

4. USB Service Voltage: 4.5V-5.5V

5. Operating Temp: -40°C - +70°C

6. Storage Temp: -50°C - +80°C

7. Compatible with Windows XP Professional/Windows2000/7/8/Me/vista
about speed
4GB/8GB/16GB/32GB/64GB writing speed is about 4m/s-10m/s, if you are lucy, maybe you can get much 11m/s+

Besides the speed is affected by the performance of your computer, so different computer has different speed,

thanks so much for your kindly understanding
Capacity flash memory products are usually shipped in accordance with 1MB = 1000KB, 1G = 1000MB computing, but the operating system using binary arithmetic 1MB = 1024KB, 1GB = 1024MB, so there are some differences between the display capacity and standard capacity memory products.

This is calculation difference between manufacturer and our PC

4GB =approximately 3.5-3.8GB

8GB =approximately 7.2GB-7.5GB

16GB=approximately 14GB-15GB

32GB=approximately 28GB-30GB

The most reliable software to verify memory is H2testw.