Modern smartphones Xiaomi have long ceased to be just devices for calls and social networks. Thanks to high performance and a developed ecosystem, they turn into powerful multimedia centers. However, many users still face difficulties when trying to connect external storage devices such as USB flash drives or hard drives to their phone. Technology OTG (On-The-Go) allows you to turn your smartphone into a full-fledged computer, but in the shell MIUI its activation sometimes requires specific actions.
Unlike “pure” Android, where connecting peripherals occurs automatically, proprietary software from Chinese manufacturers often limits this function to save battery power or for security reasons. You may need to not only insert the cable, but also change the system settings so that the device begins to correctly recognize external gadgets. In this article, we will look in detail at how to enable OTG mode on various Xiaomi, Redmi and POCO models, and also look at typical errors that interfere with normal operation.
If you plan to frequently transfer large amounts of data or connect game controllers, understanding the principles of operation of this interface will be critical for you skill. We will not use complex technical terms unless necessary, but we will analyze all the nuances from choosing a cable to formatting drives. Remember that on Xiaomi smartphones with Android versions above 6.0, the OTG function is enabled by default at the hardware level, but can be blocked by software power saving settings.
Checking hardware support and selecting accessories
Before diving into software settings, you need to make sure that your physical hardware is capable of supporting On-The-Go technology. The vast majority of smartphones Xiaomireleased after 2016 have a built-in controller that supports this mode. However, older budget models or specific versions for certain markets may have limitations at the level processor or board layout.
The quality of the cable or adapter plays a decisive role. Cheap Chinese adapters often do not have the necessary pinouts or the wires are too thin, which leads to a voltage drop. For stable operation, it is recommended to use certified accessories that can transmit not only data, but also sufficient current to power the connected device. If you are using an external hard drive, it may require more power than the smartphone port can provide.
- 🔌 Use original cables or adapters from reputable brands to minimize signal loss.
- 📱 Make sure that the USB Type-C or Micro-USB connector on your smartphone is not dirty or physically damaged.
- ⚡ To connect external HDDs, consider using an active USB hub with its own power supply.
It is also worth checking the specifications of your model on the manufacturer's official website. Sometimes OTG support is stated, but only works with certain file systems or device types. For example, connecting a mouse may work perfectly, but a flash drive may not be detected due to the format NTFS, which is not readable by standard Android tools without additional drivers.
Automatic activation and MIUI settings
In modern versions of the shell MIUI 12, 13, 14 i The newer connection process has been simplified as much as possible. The system automatically detects the connection of an external device and displays a corresponding notification in the curtain. However, if this does not happen, the problem may lie in the USB access settings. By default, the smartphone can charge the connected device, but not transfer data.
To change the port operating mode, you will need to go to the developer menu. This is a hidden section of the system intended for advanced users and engineers. Activation of this menu is carried out by repeatedly clicking on the build number in the “About phone” section. After this, an item will appear in the advanced settings Default USB configurationwhere you can forcefully select the file transfer mode.
⚠️ Attention: Do not change other settings in the “For Developers” menu if you are not sure of their purpose. Incorrect configuration may lead to system instability or reset security settings.
If automatic detection does not work, try manually switching the mode. Connect the flash drive, lower the notification shade and tap on the “USB Charging” (or similar) notification. In the menu that opens, select the option File transfer or File Transfer. This action gives the system permission to mount the external drive and read its contents.
If the USB connection notification disappears too quickly, go to the notification settings of the Explorer or Files application and allow the display of important notifications.
Manual activation through the engineering menu and ADB
In rare cases, especially on custom firmware or very old Redmi models, standard settings may not produce results. Then deeper methods of intervening in the system come to the rescue. One way is to use the engineering menu, which can be accessed through a special application or code in the dialer. However, this method varies depending on the processor (MediaTek or Snapdragon).
A more universal and secure method is to use USB debugging and the ADB console (Android Debug Bridge). This method requires connecting the smartphone to the computer. You need to install ADB drivers on the PC, enable USB debugging on the phone and enter a special command to force the function to be activated.
adb shell settings put global usb_otg_supported 1This command changes a global variable in the system, telling the Android kernel that OTG support is enabled. After entering the command, you must reboot the device. If the command does not work, your firmware may severely limit this feature at the kernel level, and software enablement will not be possible without flashing.
- 💻 Install the Android SDK platform tools on your computer to work with ADB.
- 🔋 Make sure your smartphone's charge level is above 50% before performing any manipulations with system settings.
- 🛡️ Back up important data before making changes through the console.
Using third-party apps from Google Play, such as "USB OTG Checker", can help diagnose the problem, but they can rarely forcefully enable the function if it is blocked by the system. They rather serve as a diagnostic tool, showing whether the system kernel sees the very fact of connecting the controller.
Solving problems with the file system and formatting
A frequent reason why Xiaomi does not see the flash drive is the incompatibility of the Android file system natively supports formats FAT32 and exFAT. However, many flash drives and hard drives are formatted in NTFS, which is the Windows standard. The standard MIUI file manager may not have permission to write or even read such a partition without installing additional plugins.
If the system prompts you to format the connected device, carefully read the warning Formatting will delete all data on the media. If there is important information on the flash drive, connect it to it first. computer and copy the data. After that, you can format the drive in a format exFATthat supports files larger than 4 GB and is compatible with most modern smartphones.
| File system | Android support | Max. data-i="86">Recommendation | Recommendation |
|---|---|---|---|
| FAT32 | Full (read/write) | 4 GB | For small flash drives |
| exFAT | Full (read/write) | No restrictions | Optimal choice for OTG |
| NTFS | Read only (often) | No restrictions | Requires third-party applications |
| ext4 | Only with root access | Without restrictions | For advanced users |
To work with NTFS without formatting, you can install applications like Microsoft exFAT/NTFS for USB by Paragon or similar drivers from the Play Market. These applications create a virtual layer that allows the system to work correctly with “non-native” file systems. However, the speed of operation in this mode may be lower than when using the native one. exFAT.
Why does the phone not offer to format the flash drive?
If, when you connect the drive, the phone does not offer to format it and is simply silent, this may mean that the device consumes too much current and the port is being protected, or the controller of the flash drive itself is damaged. Try connecting the drive to another device to check.
Energy saving and background restrictions
Shell MIUI is notorious for its aggressive energy saving policies. The system can automatically turn off power to the USB port if it believes that the connected device is not active or if the phone's charge drops below a certain level. This often leads to the flash drive appearing and disappearing from the list of available drives.
To prevent this, you need to add the file manager or application through which you work with the flash drive to the power saving mode exceptions. Go to Settings → Battery → Energy Saver and find the desired application. Set the operating mode to “No restrictions”. This will allow the process to run in the background and maintain a connection with the external device.
⚠️ Attention: Excluding applications from energy saving increases battery consumption. Disable these settings when you are finished using OTG to avoid wasting your phone's charge.
Also check your autostart settings. In some cases, the system service responsible for the USB host requires permission to autorun. Find system services related to USB or storage in the list of applications and allow them to autostart. This is especially true for models with a large amount of RAM, where the system aggressively unloads background processes.
☑️ Setting up power saving for OTG
Using third-party file managers
The standard Xiaomi Explorer is functional, but sometimes limited in its ability to work with outer periphery. Third-party file managers, such as Solid Explorer, FX File Explorer or Total Commanderoften have their own drivers and plugins for working with USB drives. They can see the flash drive even when the system explorer ignores it.
When you first launch such a manager with a connected flash drive, the application will request special permission to access external storage. You will be shown a system window with a file tree, where you need to select the root folder of the flash drive and click the “Grant access” button or Use this folder. This action gives the application full rights to read and write data on external media.
The advantage of third-party solutions is also the support of archives and network protocols. You can unpack archives directly to a flash drive or copy files from the cloud to an external drive, bypassing the phone's internal memory. This significantly speeds up working with large amounts of data and reduces wear and tear on the internal flash memory of the smartphone.
Third-party file managers often bypass MIUI software limitations, providing more stable access to external drives than standard system tools.
Frequently asked questions (FAQ)
Why a flash drive is detected, but the files do not open?
Most likely the problem is in the file system. If the flash drive is formatted in NTFS, standard explorer may see it as empty or not have read permissions. Try formatting the drive in exFAT or installing a driver application for NTFS. Also check if the files themselves are damaged.
Is it possible to charge the phone via an OTG cable?
Usually no. In OTG mode, the phone acts as a host and itself supplies energy to the connected device. Charging the phone is only possible in reverse mode (when the phone is connected to the charger). Some expensive docking stations with Power Delivery support can simultaneously transfer data and charge the phone, but this depends on the specific model of accessory.
Is it safe to remove the flash drive without software shutdown?
No, it is not safe. Android caches data before writing it. If you remove the flash drive during recording or immediately after it, the files may be damaged and the file system may crash. Always use the “Safe Removal” notification in the curtain or the corresponding button in the file manager before physically disconnecting.
Does Redmi Note 8 support connecting a keyboard and mouse?
Yes, the Redmi Note 8 model and most modern Xiaomi devices support connecting HID devices (keyboards, mice, gamepads). For the mouse, a cursor will appear on the screen, and the keyboard will work in any text field. For gamepads, you may need to configure the buttons in specific games.
What to do if the phone gets very hot when you connect a flash drive?
Heating can be caused by high power consumption of an external device or intensive data recording. If the heating is critical, the system can turn off the port for protection. Try using an active USB hub with external power to take the load off the battery and phone controller.