1. Some customers said that the memory card access speed is slow, and the speed is affected by many factors. Some customers' computers can directly read the SD card, after all, there is a card case between the card and the computer. Some customers are plugged into the phone with data cable to connect the computer, because different mobile phone parameters and different system reading speed are not the same, so we do not recommend whether to use a card sleeve or a mobile phone card reading, it is best to use a dedicated card reader to read the memory card. There is some computer USB interface is divided into two kinds, one kind is USB2.0 version, is a kind of USB1.0 version, USB also may appear the problem of insufficient power supply, if you meet the above two questions is likely to be the problem with USB port, encounter this problem you can change a USB interface or change computer to try! At present we can think of on these problems will cause slow speed, if you have better Suggestions feel free to propose to us!

2. The problem of allocating unit size during formatting.

 The large access speed of allocation unit is fast and occupies large space.

 The small access speed of allocation unit is slow and occupies little space.

 Win7 environment can be directly selected format unit size, but the operating system below XP needs to use DOS command to format the unit size.

  So: speed or space, you need to format when you choose to test copy 120M RMVB format video for example.

TF 4G capacity is about 3.68g, copy speed is about 8M per second, copy speed will slow down accordingly.

TF 8G has a capacity of about 7.4g, and the copy speed is about 10M per second. For example, the speed of copying fragmented files will slow down accordingly.