The Mac cannot directly connect the Android phone to transfer data through the data cable, and you need to use tools, if the user uses a Mac. Please search for corresponding tools from the Internet to use, Xiaomi cannot directly provide tools or guidance.
The following content refers to the Windows system on the computer side:
Please note that it is not necessary to enable "USB debugging" when the mobile phone is directly connected to the computer to transmit data. If you enable it at will, it may cause the risk of user data being secretly acquired by third-party software on the computer, so there is no need to emphasize the setting of USB debugging.
USB debugging means that Android system opens read and write permissions to third-party programs, so that third-party mobile phone assistant software can be used to identify mobile phones and other operations.
First, verify the phone model and MIUI system version used, and whether the notification bar of the phone will appear as shown in the figure after connecting to the computer. Different MIUI versions of the phone connected to the computer will have different displays. The specific displays are as follows:
If it says "Charging via USB" (or connecting to a MIDI interface via USB, transferring photos), click to select Transfer File (MTP)
After selection, the computer desktop "My Computer" displays the phone model and portable media devices (or mass storage devices), double-click to access the phone storage.
If there is no above display, you can troubleshoot according to the following ideas:
1. It is recommended to replace the data cable and use the USB port to test whether it can be connected. (If you use a desktop computer, it is recommended to use the USB port on the back of the computer case).
2. Currently Xiaomi Phones and Redmi Phones use the MTP protocol to transfer files, and the windows system is responsible for the MTP support of the windows media player (the player that comes with Microsoft computers). It is recommended that you check whether the Windows Media Player version of your computer is 10 or above. If not, you can replace the computer or try to upgrade the application version (you can consult Microsoft for the upgrade method).
3. Try to install Xiaomi Assistant from the computer, the download address is http://zhushou.xiaomi.com/. (Note that this software is not used to connect to the computer, but the Xiaomi Assistant has a driver. After installation, connect it directly to the computer through the data cable and try to see if there is the above prompt for connecting to the computer.)
4. Try to close the third-party security software and third-party assistant software on the computer. The third-party security and assistant software may disable some system functions, so that the computer cannot directly read the mobile phone storage.
5. If it still cannot be used, it is likely that the computer system is an early version of XP system, some simplified version of the system (pirated system), and many functions cannot be used. (Most of the domestic Windows XP systems are pirated and old versions, so they do not contain the MTP driver protocol. In this case, it is only recommended to replace the computer and try. Windows7, windows 8, windows10 and above computer versions are automatically installed and updated. Drivers do not need to be re-installed. Manually download the driver, if the user does not have any display on the computer with this type of system, please check whether the computer system version is the latest, if not, you can manually update it, there are still problems, try another computer).
6. For models below Android 6.0, ask whether the PTP/MTP protocol has been turned off. If it has been turned off, the MTP/PTP solution refer to What should I do if MTP/PTP cannot be selected after the mobile phone is connected to the computer?
The above are detailed solutions. The relatively simple steps are as follows:
1. Try to replace the data cable and USB port. The desktop computer can use the USB port on the back of the chassis to test.
2. Try to close the third-party security software and assistant software on the computer.
3. Try to replace the computer (try not to replace it with the same type of computer).
Tip:
1. The XP system of mobile phones before Android 4.0 can be identified as "mass storage devices", but mobile phones after Android 4.0 need the MTP driver of the computer (different from the drivers required by machines before Android 4.0), and are identified as "portable media" equipment". Therefore, if the computer can recognize some mobile phones but the Xiaomi mobile phone cannot, it may be caused by the lack of the corresponding MTP driver due to the different Android versions.
2. Since the mobile phone is connected to the computer using the computer MTP protocol, there is currently no separate mobile phone driver (such as the Mi 6 mobile phone driver), but the media playback demonstration protocol (based on windows media player) on the computer is used. It is usually a computer problem (the computer system is a lite version, the MTP driver is missing, the windows media player version is too old, etc.).
3. The computer directly recognizes the virtual SD card without turning on USB debugging. USB debugging is the Android system's open read and write permission for third-party programs, instead of directly reading the options required for mobile phone storage, without turning on USB debugging.
4. Xiaomi phone or Redmi phone after Android 6.0, you can also manually set "Select USB Configuration" to MTP protocol or PTP protocol in the developer options (PTP is an image transmission protocol, select this option, the computer will only read the phone photos inside).
5. At present, Xiaomi Assistant has been fully revised and launched, you can go to zhushou.xiaomi.com to download.
The test version is different from the official version, you may encounter some problems in use, and you can give feedback in the forum in time.