About real capacity

4GB = approximately 3.6GB-3.9GB
8GB = approximately 7.4GB-7.8GB
16GB = approximately 14.2GB-15GB
32GB = approximately 28GB-30GB
64GB = approximately 58GB-60GB
128GB = approximately 110GB-120GB

This is calculation difference between manufacturer and your PC, please Google 'Memory card capacity' to get more information.Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1 GB = 1.00 Billion bytes.The pursuit of the perfect person is not recommended to buy.
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100% real capacity,pass H2testw.

About speed

All the data stored in this store comes from the official, because the computer configuration level, file size attributes, etc. will affect the test results, so the actual speed is different.

U Disk compatibility

1. Please make sure that the USB flash drive is properly connected to the device.
2. Please confirm whether the equipment used at the time supports the U disk of this capacity and the corresponding file system (exFAT/NTFS).
3. Please confirm whether the files in your U disk can be supported by the device.
4. Different main control schemes used by different devices in the market may have compatibility issues
Large files above 4G that cannot be copied
For better system compatibility, the factory default format of the product is FTA32 (Microsoft's default disk format), and a single file copy does not exceed 4G. If you need to store more than 4GB files, please reset the USB flash drive format: 1. Connect the USB flash drive to the computer 2. Right-click the U disk partition and select format. 3. Select NTFS or exFAT format in the file system options. 4. Click start and finish.
No response when the U Disk is plugged into the computer
Under normal circumstances, the driver will be installed automatically. If it is not recognized, please turn off the computer's firewall and anti-virus software before trying. If you can't solve it, please contact online customer service, there is professional customer service guidance to ensure that the equipment is used normally.

Features:

● Read Speed: 10MB -18MB/second
● Write Speed: 5MB -8MB/second
● USB 2.0 interface with higher speed and higher stability
● Portable, lightweight, high-quality metal protects the connector
●Environment Temperature: -40°C - +70°C
●Storage Temperature: -50°C - +80°C
●USB Service Voltage: 4.5V-5.5V
●Storage Lifetime: More than 5 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