Wansenda 16gb metal rotary USB Flash Drive 64gb 32gb swivel Pen Drive 128gb usb memory stick flash drive 8g 4gb usb 2.0 pendrive

Storage Capacity: 4GB/8GB/16GB/32GB/64GB/128GB.

Interface: USB 2.0
Writting Rate: 5-10MB/s , Reading Speed: 10-20 MB/s
Storage Temperature: -50°C – +80°C
USB Service Voltage: 4.5V-5.5V
Storage Lifetime: More than 10 years
Use A-class chip, can be erased repeatedly for 100,0000 times
Operating System: Win98/ME/2000/XP/ Vista/win7/win8 , Mac OS 9.X/Linux2.4 or above
USB connection,support Hot plug & Play.
Easy to read and read in high speed ,No need drive/power supply only plug in.

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
64GB=approximately 58GB-59GB
​128GB=approximately 110GB-120GB

The most reliable software to verify memory is H2testw.