Flash memory vendors are using decimal arithmetic:1MB = 1000KB,1G = 1000MB calculated, the operating system using binary arithmetic:1MB = 1024KB,1GB = 1024MB;so there are some differences between display capacity and nominal capacity of flash memory product.
16GB = approximately 14GB -15GB
32GB = approximately 28GB -30GB
64GB = approximately 58GB -60GB
1).Try to use USB3.0 port to test it, please don't use any 2.0 equipments,sometime the 2.0 system can not test the real speed successful;
2).Do not Insert the pendrive with brute force and frequently,it is easy to damage the plug;do not pull the disk when access to data,or likely to cause data lose;try to pull it after disconnect disk.
1 x Sandisk CZ48 original USB3.0 Flash Drive wich retail package